If you attack someone's character in an argument rather than the subject at hand. If you resort to creating a false dichotomy in which there are only two possible choices.
Especially bandwagons, albeit some bandwagons are guilty pleasures to jump on such as anything that pisses someone off like me.
Also I like playing devil's advocate in conversations..
If I agree with you on issues I may poke and prod to see where exactly you stand or especially if we talk about religion.
I will give you shit.. So don't bring it up. I can be insensitive.
It's funny. I'm pretty chill otherwise, just don't get me started if you have no sense of humor.