1st of all, I have never told someone to sit down. But I was tempted at the Michigan game. There were three people about three rows in front of us who stood for virtually the entire game. They weren't rabidly cheering anymore than anyone else, they were just standing. In fact they were generally at lot more sedate than the people around us. They were easily in the 30s so not recent grads who are used to standing for the whole game. Everyone in line of sight was annoyed but no one said anything because we all sort of "got it" but these three were a giant pain in the ass to all the people who had to stand up to see the game. You can cheer sitting down as well as you can standing up. There is nothing sacred about standing up unless you are in the student section.
Thought I'd stir the pot....................