So yeah, people who are there just to 'shit post right wing stuff' should definitely consider what they are doing.
It’s very easy - and indeed I’ve seen it with my own eyes when I was younger - for communities that accept jokes about minorities or LGBT people to very quickly devolve into open fantasizing about actual physical harm of such people. Back in the early 2000’s gaming forums were rife with that kind of supercharged self-radicalization.
Having grown up in South America, I take the ‘jokesters’ wearing t-shirts with slogans such as ‘Pinochet did nothing wrong’ and ‘make leftists afraid of helicopters again’ extremely seriously. Several of my parents’ acquaintances were ‘disappeared’ by the last dictatorship. My dad - a student at the time who wasn’t involved in any kind of political activism - shaved his beard because he was afraid he’d be mistaken for a ‘commie’ and jailed or worse. All you need is a small percentage of idiots actually believing the ‘joke’ for real life consequences to follow.