A very simple pattern of 4chan posting culture is to offend others in order to provoke a debate about what you actually want to discuss. It's the 4chan version of clickbait. The /g/ catalog is absolutely filled with people doing this. Want to talk about Linux? Pretend you're a superior Windows user and mock Linux for not having some feature. File picker thumbnails are a common example. This happens all the time and can generate some rather unique discussions.

Because it's anonymous, you'll see a lot of frowned-upon behavior which can nevertheless be interesting. Everytime some drama happens on GitHub or LKML there might be a random 4chan thread discussing it in the usual offensive tone. It's interesting to read about what people think, especially opinions they wouldn't express if they had to sign the post with their real names.