It won't lead to it, and I doubt we'll ever see segregation here.
Fights at NFL games aren't uncommon, but they're rarely insanely violent and involving more than 2 or 3 people.
My dad, brother and niece went to the Bears game in KC last week and said it was a pretty tame crowd.
I've never had issues at NFL games before, but I don't get hammered and talk sh**, either.
Closest I've ever come to any issues was at a college conference championship game when I was in school. But it was after the game on the concourses when Oklahoma fans were being ridiculous gloating about their win.