There is a big problem in youth football. And as Paddys story shows, it is not the children that is the problem, but the parents. The last time I watched a youth game, the referee was constantly being abused by parents, and some parents were screaming and shouting at the players.
I don't know about other areas, but now in Leicestershire at youth games, supporters have to stand at the side of the pitch, with different teams supporters on either side of the pitch. All clubs in the Leicestershire youth league have had delegate one person who is responsible for ensuring the players and the referee are shown due respect. And so far the scheme has worked quite well.