They got nothing on Vikings Fans. Back in 02, the Bills came to Minneapolis and I got tickets for my family with the rest of the MN Bills backers. All through the game, the Vikequeen fan's threw full plastic beer bottles at us, and actually hit my daughter in the back of the head, which led to a concussion.
Their security carted off two Bills fan's from Buffalo who flew out for the game. The rest of us stood up and told security it wasn't them, but the A-holes up behind us. Security did nothing and ended up ejecting four guys that were completely innocent.
I sent a letter to the Vikings management demanding an apology and reported my daughter's concussion from the assault. They never responded.