NFC East in general imo. Wearing any of those teams gear in public is like wearing a burka to a confederate flag rally to those people. There's no such thing as friendly ribbing, it immediately turns nasty and often leads to a sloppy parking lot fight between fat drunks who peaked in high school.
When I'm enjoying a sports bar public football spectacle I tend to mock the play of every team evenly to keep everyone nearby annoyed but confused. I like to find people who are willing to joke without being an ass. The people who feel the need to stand up and clap as hard as they can for each and every goddamn thing their team does crack me the fuck up. (---> ALABAMA FANS <-----) Tide is beating a nobody AA team by 50 points and your punt returner made a fair catch? Better stand on your chair and clap bro.
My favorite came in the playoffs a couple years back with my friend (loudly) informing me that we were about to get in a fight with some fat Packer fans because after they bitched for the nth time about "all that faggot [Kaepernick] can do is run" he zipped a TD pass over the middle and I quipped "great run, Kaeperbro." Really guys? C'mon, lighten up, the game was still close and both sides were sloppy. Hell, the only thing bad I'd said about the Packers was that Rogers should avoid sucking any dicks while in the huddle. Lacy was a goddamn freight train that game.
Really though its not the talkers but the ones that are quietly seething over their beer that you have to worry about. I've seen a Pitt fan who didn't say a word the whole game blast someone in the head with his mug. Blood everywhere. Good times.