I use to ump a few middle school baseball games, only because the regular umps all quit, so they asked at the games, and the coach pointed to me. I did it for about 6 weeks, at first I was so nervous, but after that, I never listened, nor cared what they were saying, including the players. It was usually my kids team, or the parents to my kids team yelling, and complaining, mostly to give me shit, I would just every once in a while sneak the middle finger at them.