I'm an Eagles fan.   And I don't think the Vikings fans going to the Art Museum and doing Viking chants was a good idea, becuase it seemed to be saying, we are taking over your city!    That said, Eagles fans who were throwing bottles, pouring beer on people, giving people the middle finger, among other things...there is call for that.   Once you go from being verbal to physical you have crossed a big line.  It's embarrassing to the city.   And the national media picks up on it and pounds our city.  We can buy up tickets to prevent others from going to the game, but once other teams fans have tickets, my goodness, don't be a jerk.  No one should be made to feel in danger.  This happended to me in Pittsburgh in 2004.  But my other 6 road trips were uneventful.