I'm not saying you're wrong, but after a game, if you feel confident enough to talk shit to people close up after a win, you should at least be prepared for the possibility of what can happen next.
As a rule, don't talk shit or confront anyone you don't think you can take a punch from. Not because it's wrong or right on either side, but you don't know what the other person's thought process is. And this isn't exclusive to football either. Its anything.
The moral victory of thinking the other person needs to re-evaluate their life isn't worth much when you're getting medical attention for getting dropped in the street.