Aside from our fans I have never heard of another instance, college or NFL, where an Unsportsmanlike Conduct penalty was called on FANS BEING TOO LOUD. I wouldn't be surprised to hear an example where it was called due to fans throwing something (certainly not tortillas used as Frisbees though) or rushing the field twice as a rehearsal for the real deal; but i all but guarantee "being too loud" wont be one of them. I was around 12yrs old when this happened but i thought we may have dealt with it a 2nd time also VS Air Force but I can't confirm it