Mentors are brilliant for sure, if the club can afford to have them around. Cases of parents and coaches yelling at referees is too common. That's why we either have teenagers or 50 year olds refereeing. The teens quit, because the crap that they put up with is not worth the few dollars they're paid. That leaves the older fellows, who may be good referees, but there's only so many of them, and they struggle keeping up with the older boys. We need referees in the 25-40 age range...and they are rarer then hen's teeth.