I assume that the people who were told to leave their seats with alcoholic drinks (in section 307) were people who purchased regular tickets and ended up in the student section. Before the game, they were "catching" people and making them drink it out in the halls. When the game was going on, I don't think I noticed as much control.
Anyway, when I posted about the standing/sitting situation, I hadn't gotten to what you had written. I just say people talking about seating.