During the Frozen Four in 2011 the poor guy in question see picture above; you've probably seen the video and pictures before got caught up in the moment and was taken to task by opposing fans that don't cheer for the Green and White.
I was tipped off about this little gem through an email - if you watch this Through These Doors video an at roughly the 5:32 mark of the video you will see a fan wearing lets say maroon colors sitting to the left of the stanchion in the front row flip off the Fighting Sioux players as they celebrate a goal against the Saint Cloud State Huskies.
The moral of the story is you never know when the camera is watching and don't do something that you might regret later. I would also say that no fan base is immune to this either.
