I guess I'm the odd one out because, God help me, I actually get along fine with them. Maybe it's the inherent seeping corruption of NJ or marrying an Eagles fan but I shall describe to you the most I've been heckled by an Eagles fan
*Walking down the street in a blue and red hoodie*
E: Hey! Are you a Giants fan?
Me: No, Bills
E: Oh. *Walks away*
The ones I know in person generally know ball, have a reverence for fringe journeyman players of the 00s like we do to Fitz, Stevie and Freddy. They bluster but don't really go at it until you jaw back...or are a Cowboys fan, and that is levels of being a hater that I can get behind.