Packers fans show up in droves in Indy as well. I think the Colts were the first to start tagging games as premium games. Years ago, when they were still in the dome, we bought tickets for the Packers game, but they did not just sell single game tickets. You had to buy a preseason ticket as well. So for the Colts-Bills preseason game that year, there was a LOT of green and yellow in the crowd. 😂
I also recall a number of people getting warning letters from the Colts stating that the team was aware that fans of the visiting team were in their seats and that happened again, they could lose the rights to those seats for season tickets. I think they were one of the first organizations to do that as well. Yes they do have a system in place where every seat can be seen by a camera.