A local ASA umpire says that a "coach" cannot be behind the backstop. And since everyone visits their DD at the dugout, he assumes everyone is a "coach". And he pulls that card anytime he wants. I mount my camera behind the backstop before the game starts and start/stop well after the inning starts or stops, or he will call dead ball and kick me out. I should note, this is local REC ball and I have never seen this anywhere else.....ever.
A coach cannot be outside the team area, so if the umpire is using that excuse then he needs to require all the parents to be inside the dugout.