There are signs posted all over the stadium "zero tolerance". I was there for the regular season game that year and the AFC champ game. At the regular season game with a Jets shirt, hat and fleece. A Steelers fans near me told me if anyone gives you shit just point at the sign... they'll stop because they know they'll get thrown out. I never had any issues at the AFC champ game. Even inside Bettis 33 hours before the game people were very nice.