As a very young first year HS official at 20 years of age, while reffing a boys freshmen game, I had a spectator standing just in front of the bleachers opposite table side berating me. I gave him the heave-ho. It turns out that he was the varsity coach. After the game, his tone changed completely and he pathetically apologized only when he realized it meant he would be suspended from coaching his game. Unfortunately, the varsity crew decided that it didn't need to be reported and let him coach. And I didn't know any better regarding how to report it.