I understand your frustration with neanderthal behavior at games. If it gives you more cheerful dreams at night, visualize my experience watching the football team from my daughter's school doing a similar encroachment on the field during a performance. We tried to warn the young man that he was standing way too close to the colorguard. She did her job, spun her flag, and he went down...he missed the second half. Don't mess with the band...they carry weapons!