Now don't get me wrong, I expect vulgarity at a game and even partake in some of it. But chanting "faggot" and throwing things at a player's grandmother and calling her a whore is more than just below the belt. Being the obnoxious drunk frat guy is one thing, this is something else entirely.
I'm not going to advocate a solution by clamping down on fan behavior and the potential 1st amendment right violations, I'm just saying this is in very, very bad taste.