I complain about this enough, but I think I've finally got it figured out.
Going to football games just isn't a big deal to alot of students here. Alot of people come here because of academics or because they didn't get into UF or FSU. I've been to games with people in my classes and some of them just sit down and watch. The idea of getting up and yelling seems obscene to them.
Football is a culture. You either grow up cheering, learn quickly, or don't go to the games. Kids who's parents and grandparents went to UF or FSU football games have taught them what to do at games. When it's our kids, and our grandkids going to the games, they will have grown up in a USF football culture and be able to appreciate it more.