I think it's more about just being respectful to the people around you. I know when I'm in hostile territory and just try to have fun with it. Strike up a conversation and compliment the stadium, colors, wife ass whatever. Make a friend early in the game and you'll be fine
I usually take it upon myself at Bills games to talk to opposing fans. I don't want to see a fight any more than they do and I usually tell them to just take everything in stride. It's just a game.
If they don't listen, well good luck to you