When college gameday came in 2008 for the TCU game, a bunch of people including myself were there the night before holding our spot in what we understood to be the line to get in (they wouldn't let anyone in the set thingy that early). So the next morning the BYU police come and make us form a seperate line causing everyone who was there camped out to lose their spots as people who just showed up darted to the front of the line. They then decided to let people in like two at a time because I guess it's not safe to have more than that going in at a time. They also thought they needed to make sure they checked every person's sign to see if they approved of it, so the whole process of getting roughly three hundred people in took forever. And this was all like at six in the morning. I was furious.
I have also seen BYU police pick random fans out of hundreds to hit or tackle during a court or field storming.