As a former cheerleader (and a coach), I get annoyed when...
1) there is no "coach" to be seen. I'm sorry, I like Bring it On, but the cheerleaders don't choose the squad, the coach does
2) from Bring it On (again), a national routine isn't straight dancing, they (the judges) actually (shocker) want to see you do a cheer. (concept).
3) cheerleaders don't wear jewelry (i.e. pearl necklaces, big hoop earrings, naval piercings), especially not during a competition or games! Heck, my cheerleaders had to take off all jewelry just for practices. We had to warn them not to get piercings done as during the season, it would come out.
I'm sure there are more that bug me but I'm just too tired to think of anything else right now.