I went to a Bills-Chiefs preseason tilt at Arrowhead in '95. My grandfather still lived in KC then so my then-girlfriend-now-wife and I happened to be in town and decided to go to the game. It was a sold-out sea of red, even in preseason. Pretty cool. The worst treatment we got was when a middle-aged lady silently flipped us off as we walked by their tailgate before the game... I was wearing a Bills shirt, of course, and I think they were still a little pissed about losing to us twice in the playoffs.