This might be legit. The woman sitting next to me at the OU game was covering her ears when we were on defense as I was clapping, stomping my feet and yelling every third down. A few years ago, I was told to "sit down" during opposing free throws at a Tennessee basketball game. Some wealthier Vol "fans" seem to confuse collegiate sports with the golf tournaments or strings concerts they normally attend.
Funny thing was, when the woman at the OU game left to go the bathroom her husband joined right in with me in yelling, stomping his feet and pounding on her empty seat! So, even though people like this really do exist, they're probably a very small minority.