When you mention one thing and someone makes an assumption and throws a rant
When you ask a question and they literally pull shit out of their ass to try and make you look bad (the original post they made summarized as "marriage is an outdated form of control" and by asking that (along with a few others commenting), OP went into a royal hissy fit and pulled gay marriage out of literally nowhere)
Condescending people
Someone called me mentally retarded and then later posted pretty much "you're still mentally retarded but not as much as I first though so let's be friends" and the whole tone was "I'm better than your dumb ass"
I didn't reply to either of them. The one pulling shit outta nowhere because they very obviously wanted an argument, the condescending one for being condescending. Fuck that shit