My son's high school coach will come out of the dugout and tell parents to knock it off. He says it's his job to question calls. Before I continue I'll state I believe my son's high school coach is becoming a very good coach (this fourth year). He bitches about too many calls. This is the view of umpires I've chatted with before games (twice) in the parking lot. One asked if anyone has noticed the team rarely gets close, debatable calls late in the game. He told me this isn't just their view but the view of the umpires across the conference. This was an umpire I know well enough that he knew I would not take this information back to the coach or league.