I have a suggestion. If you do not like yelling, "You Suck", then don't. If you don't like yelling things about the Rangers and Flyers when neither of those teams is playing, then don't. If you don't like yelling about the goalie or coach, then don't.
If the behavior offends you, then lighten up and realize that people go to games as a release and part of that release for some is to act differently than they would in real life. If you are worried that you are bringing people who might be offended and think differently about you, then explain to them beforehand about what to expect.