I'm just glad that most fans have the right idea about this stuff.
I live in Indy, and a Colts season ticketholder friend last week refused to sell his tickets to an enemy fan (they hosted the Dolphins last week) and gave me his tickets for free instead under the condition that I cheer for the Colts. I told him that I was wearing my Seahawk jersey to the game but that I'd cheer for the Colts and try to find a Colts fan to go to the game with and fill the other seat (which I did). Win-win.