Due to Play-by-Post games having much less official rules, with most of the work being put on the GM, it is much harder to successfully get away with Loophole Abuse. However, the are still times when this happened.
- The Ballad of Edgardo is about how one man accidentally created an utterly worthless underpowered character and then turned him into the most powerful character in the game through exploiting a massive loophole. Edgardo was an unarmed fighter, which gets no combat multipliers and thus does Scratch Damage against pretty much anything with any amount of defense whatsoever. He also had the perk "Overflowing Spirit" which removed the cap on the amount of Spirit (the game's version of mana) he could have but locked him out from using elemental attacks, only allowing him to use the Non-Elemental "Raw Spirit", which can't be resisted but its damage is piss-poor to compensate for this. The only way he could do a respectable amount of damage was to spend days stockpiling Spirit and then spending it all on a single attack, and even that would do little more than stagger the enemy. The narrator spent a night combing through the game's lore, desperately searching for anything that could help him salvage his terrible build, and he found it: The city of Haven, home to the Spirit Well. While inside the city, a player's Spirit is always at full. Since Edgardo has no Spirit cap, "full" for him was "infinite". Goodbye Scratch Damage, hello One-Hit Kill. Edgardo then learns that his infinite Spirit would only last for a single day after leaving the city, but then he realizes something: his last battle leveled him up, giving him exactly enough skill points to learn Teleportation. With this skill, Edgardo could simply teleport back to Haven whenever the effect was about to run out, refresh it for another day, and then teleport back to where he just was. Or at least, he would have been able to do that if the entire player base hadn't rioted and forced the mods to shut down the entire forum.
- In Destroy the Godmodder, this happens often enough that new rules have to be written every couple of months.
- When he saw how many people jumped straight into summoning entities, TwinBuilder, the GM, put a charge limit on summons. However, Crusher 48 and TT 2000 were already charging up 100-post entities, more specifically the UOSS and a one-shot cannon. This made them exempt from the new limit, and the charges were deployed as normal. The UOSS (Ultimate Orbital Space Station) proceeded to attack the Pro-Godmodder entities and "Lick 'em good" for a significant percentage of the [Homesick Invasion. The 100-post cannon managed to stun the Godmodder for a turn and leave him open to attack, when the rules state that charged attacks cannot damage him.
- In A Game of Mafia, this is Timeline Master Awe's entire plan — fictional beings within the Ideaverse feed on Clap Your Hands If You Believe, including being remembered. But the rule doesn't discriminate between memories, including traumatic memories—something which a game about paranoia and murder is bound to cause.
