I've only been to six games and they were all last year so I don't have as many to pick from as you guys...
...but anyway I wore my Genesee Beer hat to all of the cold weather games (Bills and Bulls) last season. Then somehow I left it in my friends apartment when he went home for winter break. So I went home to Rochester for a few days around Christmas and got myself a nice wool hat with a Giants emblem on it. The following Sunday me and one of my buddies go to the Bills/Pats game. And as you can predict, a lot of Pats fans were at the game and ran their mouths. Everytime someone said something to me I just looked them in the eyes and pointed to my hat. They shut up.