You would love the rivalry at Highmark.
The beauty is almost all our fans don't push it to far.
In the mid 2000's when they hadn't made the playoffs for a while things were getting out of hand though and visiting fans were not very welcome.
I brought my 12 year old nephew to game against the Raiders 20 years ago
There were lots of fights and even a few burned Raiders jerseys.
I said to my nephew this was the worst I had ever seen it and told him not to be frightened and try to enjoy the game he told me he wasn't scared because he was with me
I was 6'2" 235lbs then (a bit heavier now)so I guess he felt Uncle Tom could handle things.
The team started a fan advisory board soon after with level headed season ticket holders and implemented the fan hotline to text security about drunk or violent fools ruining the party.
If your caught being a goof ball you could lose your seasons jf you sell or give your tickets away and they cause trouble you could lose your season tickets
They also dressed police as visiting fans to curb over the top abuse.
I think the stadium is now one of the safest in whole league.
You now see visiting fans tailgating with Bills fans which is awesome
Be respectful and have fun if you decide to go Poormans and rep your jersey.
Sorry for the long post