GLENDALE, AZ - OCTOBER 26: Philadelphia Eagles fans cheer prior to the NFL game against the Arizona Cardinals at the University of Phoenix Stadium on October 26, 2014 in Glendale, Arizona. (Photo by Christian Petersen/Getty Images)By: Christian Petersen/Getty Images
Did you hear about that mean old Saints fan who snatched a football away from the Bengals fan? Fans do cruel things to one another all the time. But when does it go too far? And where can we find the rudest and most unacceptable fan behavior?