The cheer squad's been great in my experience, but I can understand how shit breaks out, only takes a couple of well placed insults and they're away. I don't get when opposition supporters come and sit dead set in the middle of our cheer squad but lately they've been pretty fun - those Freo blokes in front of us were having a laugh at my digs at Pav and Sandi and were dancing around when they'd kick a goal.
The worst I've had is getting into an argument at a neutral game (Collingwood-Geelong) for wearing a Dogs scarf in a queue for food, the moron had a crack and I had one back (not a great idea but you don't think on the spot, really - he was about 6'4 and I'm not that tall), but his mates had a laugh and told him to get on with it. Pretty silly to get too worked up but people do look for it.
The outer actually hasn't been too bad in my experience! You get the odd dickhead who's clearly out for trouble, but usually people just take the piss out of them and they move at half time.