History Main / HatePlague

** The Cult of Rakdos from the plane of [[CityPlanet Ravnica]] has this effect on those who visit their establishments; whether they be carnivals, theaters, or restaurants. Most of the cult is full of sado-masochistic serial killers who have no problem tearing each other apart, but it does tend to get worse when the higher ranking demons of the cult can drive regular citizens to participate in the bloodlust.

** In " [[Recap/StarTrekS1E24ThisSideOfParadise This Side of Paradise]]", an anger-inducing sonic broadcast is used to counteract the effects of tranquility-inducing spores.

* The ''Series/{{Angel}}'' episode "[[Recap/AngelS03E06Billy Billy]]" had a variant: Billy Blim, a vicious misogynist, caused any man he touched to hate and attack any woman they came near. Angel was immune, since even as [[SuperpoweredEvilSide Angelus]], he never felt hate toward his enemies.

* One episode of ''Series/{{Charmed|1998}}'' got as "realistic" as you can with this trope. A demon was killing [[DreamWalker Sandmen]] to collect their magical sand; as the Sandmen's numbers dwindled, they were unable to spread positive dreams throughout San Francisco. As time passed, the citizens became angry and short-tempered with one another, and one of the surviving Sandmen explained that humans need to dream to work out their problems and aggression subconsciously; if the demon succeeded in wiping out his kind, humanity would destroy itself in unchecked rage.
** A more concentrated example happens in "Sin Francisco," which focused on the SevenDeadlySins in the form of seven small crystal orbs. The person infected with the Wrath orb became violent and uncontrollable.

* ''Series/{{Eureka}}'' - "All the Rage": A device designed to ''calm people down'' [[GoneHorriblyWrong instead]] turns GD into [[ShoutOut "a Romero]] [[Film/NightOfTheLivingDead1968 movie"]].
* The ''Series/{{Farscape}}'' episode "Crackers Don't Matter" has a highly amusing Hate Plague: light from a nearby star causes several characters to become obsessed with ensuring their fair share of crackers, to the point of barricades and gun battles. Technically, only [[ProudWarriorRaceGuy D'Argo]] becomes more aggressive while Rygel gets greedier and Aeryn becomes more paranoid, causing the three of them to fight. [[EthicalSlut Chiana]] instead gets hornier, and Zhaan, being a PlantAlien, has a lot of [[TheImmodestOrgasm fun times]]. Crichton is the only member of the crew who's immune, due to [[DisabilityImmunity humans having significantly worse eyesight than any of the other species]].
* ''Series/TheFlash2014'' episode "Flash vs Arrow" had a Meta Human whose power was this. It only worked if you looked him in the eyes though, and the effects only lasted a couple minutes.

* An early episode of ''Series/StargateSG1'' subjected the team to subsonic frequencies that made some of them very irritable, resulting in a shouting match and a delightfully awkward non-apology apology afterward.
** A minor one was caused by withdrawal symptoms from some creepy Goa'uld light in the episode "The Light." Similarly, Daniel's withdrawal from the sarcophagus in ''Need'' had him almost shooting Jack in one scene.

** In one episode, the closer the ship got to an undetected [[NegativeSpaceWedgie singularity]], the more the crew started to freak out, basically giving them a nuclear version of ObsessivelyOrganized tendencies.
** This is also one of the possible effects of [[GreenSkinnedSpaceBabe Orion]] pheromones on other women.

** Season 4 episode "Night Terrors" saw the ''Enterprise'' trapped in a NegativeSpaceWedgie that drained power away from the ship's reactor and left them stranded, and the crew began to experience increased irritability, paranoia and eventually hallucinations. [[spoiler:It turned out that the crew of another ship trapped in the same way was trying to contact them telepathically to propose a means of escape, but their method was preventing most of the crew from entering REM sleep; the HatePlague in this case was simple sleep-deprivation.]] Despite the relatively mundane explanation this episode had some of the most genuinely creepy moments in the series.
* ''Series/StarTrekTheOriginalSeries'', "[[Recap/StarTrekS3E7DayOfTheDove Day of the Dove]]": An {{Energy Being|s}} that feeds on hate brings the Federation and the Klingons, who are trying to abide by the peace treaty, into conflict. It goes as far as implanting FalseMemories so that the manipulated will have an extra source of conflict. An interesting part of this trope in Star Trek is that those who are killed are somehow brought back to life with their fatal wounds healed to fight again. Once they all figure it out the creature is repelled from the ship by laughter. Lots and lots of laughter.
** In "[[Recap/StarTrekS3E9TheTholianWeb The Tholian Web]]", a NegativeSpaceWedgie drove the crew of one starship to kill each other, and then begins to drive the Enterprise crew to outbursts of anger.

* In ''Series/TheTwilightZone1959'' episode "The Encounter", a racist World War II veteran and a young Japanese-American man who came over to do housework are trapped in the veteran's attic by a samurai sword that belonged to a Japanese soldier the veteran killed. The sword bears an inscription "the sword will avenge me". And it does, as it brings out the darker sides of both men, culminating in a violent struggle that ends with the veteran accidentally impaled on the sword and the younger man throwing himself out the window in a fit of suicidal guilt.

* Yubel uses this in duels to great effect in ''Anime/YuGiOhGX''. While she's on the field as a monster, she can force monsters to attack her; she takes no battle damage, and inflicts the same damage to her opponent in retribution. She calls this effect "Nightmare Pain." Shortly after Yubel reveals herself in Season 3, Judai's cloest friends are also infected with a Hate Plague against him, which was quite effective in bringing out his SuperpoweredEvilSide, especially when followed by their apparent deaths.

* In the ''AudioPlay/BigFinishDoctorWho'' War Doctor story ''A Thing of Guile'', the Doctor is part of a Time Lord task force sent to obtain a weapon called the Anima Device, although the Cardinal who sent them isn't entirely sure what it does. The Doctor quickly realises it's a psychic weapon that causes the task force to become increasingly argumentative. In ''Neverwhere'', Cardinal Ollistra develops a plan to combine it with the time-bending Neverwhen to not just plunge Skaro into civil war, but to make it so that the Daleks had ''always'' been in a state of civil war. The Doctor [[spoiler: attempted to reverse the effect to make the Daleks and Time Lords trapped in the Neverwhere effect pacifistic, even stablising the Neverwhen's timeframe to an {{Arcadia}}n period when Gallifreyans and Kaleds were both farmers, but the imprint of the subjective centuries they'd spent fighting was too much for it.]]

*** The BonusDungeon of the same game is a twisted BadFuture in which the villan's plan actually succeeded and humanity was completely wiped out. The result is a rather depressing dungeon where you wander around a world without life or hope, and kill insane versions of your allies from the normal time line and eventually confront a BonusBoss who's sole intention is to escape to your world and wreak havoc on it as well.

Subtrope of EmotionBomb. Contrast with LoveIsInTheAir. Compare AppleOfDiscord and PsychoSerum. See also MindVirus and ArtifactOfAttraction. Frequently overlaps with TechnicallyLivingZombie.

* In an episode of ''WesternAnimation/TheSecretShow'', Doctor Doctor creates a mind bomb that causes an entire country to develop unbinding hatred towards whoever's image was on the bomb prior to its detonation.

** In one episode, the closer the ship got to an undetected [[NegativeSpaceWedgie singularity]], the more the crew started to freak out, basically giving them a nuclear version of SuperOCD.

* In James Tiptree Jr.'s short story "The Screwfly Solution", a mysterious plague spreads outward from the equator, turning male sexual urges into murderous violence against women. The protagonist speculates this is meant to depopulate the Earth so aliens can move in after humanity has died out.

** In the episode "[[Recap/DoctorWhoS30E10Midnight Midnight]]", the MonsterOfTheWeek manipulates a group of ordinary humans into coming within a hair's breadth of [[spoiler:killing the Doctor]] by amplifying their fear, suspicion, and irritation with his ego into a willingness to commit murder. One of the [[NothingIsScarier many unanswered questions]] from that episode is whether the creature was telepathically manipulating them or whether it was able to do it through mundane psychological methods. It clearly has psychic powers of some kind given its ability to steal people's words, but at the point of its near victory it hasn't provoked any reaction from the bus passengers that couldn't be achieved simply by playing on the escalating mob mentality.

** In the episode "[[Recap/DoctorWhoS30E10Midnight Midnight]]", the MonsterOfTheWeek manipulates a group of ordinary humans into coming within a hair's breadth of [[spoiler:killing the Doctor]] by amplifying their fear, suspicion, and irritation with his ego into a willingness to commit murder. One of the [[NothingIsScarier many unanswered questions]] from that episode is whether the creature was telepathically manipulating them or whether it was able to do it through mundane psychological methods; it clearly has psychic powers of some kind given its ability to steal people's words, but at the point of its near victory it hasn't provoked any reaction from the bus passengers that couldn't be achieved simply by playing on the escalating mob mentality.

** In the episode "[[Recap/DoctorWhoS30E10Midnight Midnight]]", the MonsterOfTheWeek manipulates a group of ordinary humans into coming within a hair's breadth of [[spoiler:killing the Doctor]] by amplifying their fear, suspicion and irritation with his ego into a willingness to commit murder. One of the [[NothingIsScarier many unanswered questions]] from that episode is whether the creature was telepathically manipulating them or whether it was able to do it through mundane psychological methods; it clearly has psychic powers of some kind, but at the point of its near victory it hasn't provoked any reaction from the people that couldn't be achieved simply by playing on the escalating mob mentality.

* ''Series/{{Crusade}}'', the sequel to ''Series/BabylonFive'', had an episode where the crew visited a planet that was boobytrapped with a means of driving visitors into murderous rages. Afterwards, they would have no memory of the event and instead remember seeing a shadowy figure performing the act, leaving the victim unaware they were the actual attacker. Of course, it wasn't really a plague but [[spoiler:Technomage nanites]].

The TropeNamer is the plot of ''WesternAnimation/TheTransformers'' cartoon storyline "The Return of Optimus Prime", a red glowy virus transmitted by touch that affects human and robot alike.

A plot wherein the characters are affected by a force unknown to them and become increasingly snappish and disagreeable to each other, sometimes escalating to outright murderousness. This is often a subtle plan by the BigBad of the story who figures that it's easier to just let the heroes kill each other off. Naturally, the heroes realize it just in time. This is sometimes a way for characters to vent hitherto unmentioned grievances. Ironically, despite the use of AppliedPhlebotinum, this is a more believable version of ToiletSeatDivorce and JerkassBall, since everyone is NotHimself.

* The Wiki/SCPFoundation has a handful:

Subtrope of EmotionBomb. Contrast with LoveIsInTheAir. Compare AppleOfDiscord. See also MindVirus and ArtifactOfAttraction. Frequently overlaps with TechnicallyLivingZombie.

* Methamphetamine abuse and production. Methamphetamine abuse tends to lead to aggressiveness coupled with anger and paranoia (and in some instances can create a psychotic syndrome called amphetamine psychosis, which is almost indistinguishable from paranoid schizophrenia ''except'' that violence is far more likely in response to perceived threats, whereas most paranoid schizophrenics would want to run from or cower in fear before an imagined threat rather than fight it). When you add in the paranoia induced by the illegal status of meth use/abuse, this creates a volatile situation where people (especially users and cooks) are willing to hurt anyone who angers them/whom they see as a threat to their business or freedom. ''Series/BreakingBad'' is often an ''understatement'' of how horrifying "meth culture" can be.

* Hajun from ''VisualNovel/KajiriKamuiKagura'' takes this to an utmost extreme. [[spoiler:He is able to create a new natural law where all living beings, regardless of their scale and family relation, would begin to kill each other. From human, to animals and even insects. A World filled with slaughter and exclusion. It would keep going until all life apart from Hajun himself would have been killed, leaving only him]].

** ''Literature/{{Ash}}'': Comraich Castle, site of a brutal fourteenth century clan dispute, and currently an expensive retreat for people whose misdeeds range from sordid to sinister, has seen a recent surge in spectral activity - which includes enhancement of occupants' aggression.