Interesting video from Outside the Lines regarding students at basketball games, specifically The Antlers at Mizzou and The Pit at Oregon. Raised a few questions:
1. Do students have a 1st Amendment right to yell whatever they want at games without any punishment?
2. If a student either pays their own tuition or has a parent/guardian do so, does that give them the right to yell whatever they want?
3. If a student has to buy tickets to attend a game, does that give them the right to yell what they want?
4. If there is a limit to how far a student section can go without being offensive, what is it?
In my opinion, the university holds the right to remove students from games since it's their event on what's usually their property. However, the 1st Amendment should protect students from academic discipline they may face from things said. Official student groups (i.e. pep band, cheerleaders) are held to a different standard just because they directly represent the university.
That being said, I would probably change the definition of what's obscene. Banning fairly harmless things like "nice shot a**hole" is being a little too sensitive, as is banning sexually explicit chants outright. Where the line is crossed is where you get into deeply personal attacks; I recall some student group out there chanted the name of a player's dead mother a year or so ago, that's just wrong.
http://espn.go.com/video/clip?id=10567965