Quote: finglas "3. Keeping them quiet on the sidelines when they do show up.'"
My brother coaches RU at junior level and of course they also have to ref at that level too, his solution to gobby parents having a go at him or the kids is to blow the whistle, stop the game and then walk over to the guilty party, hand them the whistle, wave them onto the pitch and not say a word to them - no-one has yet taken up the invitation, all have shut up
It does take some balls sometimes though.