Sorry but, The Packers are definitely the best fans.
They ALWAYS sell out, every single game, including preseason and exhibition matches, no matter how badly the team is doing.
Everyone always stays until the final whistle, even if it's a blow out and it's raining.
The waiting time for season tickets is about 30 years, and parents will them to their children.
There is always a solid showing at every away game.
They NEVER boo their own team, no matter how much they might screw up.
There is no other fan base that is that loyal. Even from '88 to '92, when they were always in the basement, every game was still sold out and fully attended.
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