I had no issues at the U of A game and I cheered like crazy, I was just not disrespectful. In fact the only obnoxious fan in my section was another BYU fan who was very annoying and disrespectful and he will probably be the first to complain about how visiting fans treat him. (I actually was set to tell him to shut up, but I think his wife settled him down finally)
You make your own experience at the game, good or bad.