Here at work (close to 1000 people) as best as I can tell, the breakdown on fan loyalty is:
1. Eagles
2. Steelers
3. Ravens (maybe-ish)
4. Cowboys
Yes, we live in PA, but Dallas is not hated by all in this state. They are a team that is hated if you're not a specific fan of them, but there are a LOT of 'Boys fans here in PA.