There is a guy on /qa/ who has an absolute death grudge against /pol/. He pays for a VPN and uses a script to 'enforce rules' by flooding the board. His script/bot copies phrases from /pol/ and pastes them in threads that he doesn't like and he doesn't stop until they're dead. Mods have banned him an uncountable number of times but he never stops.
For example, here's a thread he raided: https://desuarchive.org/qa/thread/1526235
Scroll through it, seriously. Almost a literal thousand deleted posts from several spam waves, all because the thread mentioned /pol/ which set him off. And this is just one of several hundreds that he destroyed. Mods deleted all his posts and banned all his IPs only for him to come back the next hour and try again until they finally gave up and let him destroy the thread. He does the same thing on other boards and even other imageboards whenever you start a thread with certain topic that he disproves of, then he runs his script which talks to himself to simulate discussion until the thread dies.
One of his many phrases: https://desuarchive.org/qa/search/text/naseem%20hamed
Seems harmless, but all of those threads hit bump limit by force. There could be a thread on page 5 for example, which hasn't had a post in hours but then when he wakes up and turns on his bot, suddenly gets 10 posts a minute until it hits bump limit, then he bumps all other threads below it, forcing it to 404. He's been doing this for the last 2 years and he's also responsible for the "cycling" content, half the board is week-old threads being artificially kept alive.
I'm guessing he does it because he's mad that he'll never be a janitor, but who knows. It's surprising how someone can do the same thing every day for years and not get tired of it, but what's worse is that he's probably the same guy on /a/ (ACK) or /s4s/ (Sparkles) who has made it their life goal to be as irritating as possible.
These people exist. Barneyfag is tame in comparison.