Pissing people off?

I don't believe that you can piss a person off. They choose whether or not to be pissed off.

Example:
"You are such an asshole!"

I can say it to a friend and he'll just laugh it off. If I say it to a stranger or adversary, then I'll get punched in the face.

Same words, same context. My friend knows that I'm either full of it, or that he is one. The adversary or stranger probably won't admit that they are being one.

Most things you can call me and not get me riled up. Studpidity, and lack of common sense are the things that get me riled up. It's all subjective whether one should or should not be angry. Just like it's subjective whether or not someone needs an ass-kicking. Some say there is never a good reason, others say that it is the most expedient way of teaching people not to be rude and obnoxious.