@mysteryespresso To answer your question, I probably wouldn't cos some people do that on purpose and want to fight just to get you in trouble. But I can't say I wouldn't ever, if the person overreaches my boundaries, that is a highly dependent on many different things.
However I don't think it's about what I'd do, it's that people act the way they do online because they always been safe. Much easier to talk shit when you don't have to face someone.