"Who would win in a fight between ....." and then its two utterly nonsensical things, like a crocodile or a camel or something idiotic.

"I am a monstor for my weight" type threads (though they do become quite legendary)

Idiots who dont know much about anything, post they half baked views and then are not open to a debate or disagreement. They just want people to reinforce their stupid perception.

I'm sure they are more, but i dont usually open any threads that don't interest me (isn't that the point of having a forum)??

I think the worst thread would be a one where some sicko just intermittently posts the vilest, most obscene things they can find, that have no relevance to a 'boxing' forum. That would be annoying and upsetting.