The Soccer crowds get pretty wild. Security are cracking down on the cheer squads as there have been a few incidents over the past 2 years. Nothing that would stop you from going to a game, but if you want to be extra careful, I'd suggest to stay away from the seating directly behind the goals.

If you go to AAMI Stadium make sure you bring some ear plugs. The Adelaide crowd are the most vocal when they support their local football teams.