Catharsis Factor: While Patrick is the only one who pays for acting like this, after seeing him coldly brush off his friend's feelings of betrayal, even mocking him after joining in on "No SpongeBob Day", seeing Patrick get booted out of the bus when everyone heads off for "No Patrick Day" is pretty satisfying. To make it better, SpongeBob is the one who kicks him out.
Never Live It Down: "Gone" is regarded as one of the worst episodes, not just of the show, but of all time. The mean-spirited implications that everyone hates SpongeBob being the biggest reason. Unsurprisingly, the showrunners have distanced themselves from it as much as possible, as seen in the 20th anniversary special "SpongeBob's Big Birthday Blowout", where everyone bands together to throw a special party for the titular character.
Nightmare Fuel: The first act of "Gone" is unusually eerie for an episode of SpongeBob. And just the concept of waking up one morning after everyone you knew had disappeared without a trace... terrifying.