One year there was a guy with his shirt off, dancing on the seats (drunk off his head), with a baby on his shoulders and he fell off the seats. I think the baby lived. Next year someone glassed a storm fan with a glass bourbon bottle. And last time I was nearby there was a drunk chick that yelled the word "cu*t" every 10 seconds for the entire match. Long story short, seen some great games of league there, I just won't sit near the Warriors section again. And the people I used to go with don't go at all now unfortunately.
EDIT: Just read the bit above from Gizzy above, and I recall the event he mentioned. Not just the once either.
Hopefully that drunk chick had tourettes and couldn't help herself...
Aussies aren't exempt either though. Seen some shocking sportsmanship and behaviour by their fans (World Cup final 2008 - I had to physically restrain myself from hitting a couple of them, NRL grand final 2008 - the Manly fans were horrible, but the worst had to be the playoffs game between the Bulldogs and the Eels, but not going into that as the actions of one guy make me feel sick).
For the record, the AFL games I went to in Melbourne (which wasn't many to be fair) had a pretty feral/bogan crowd too.