Wolff calls it child abuse. Often it's the parent at bat, not the kid. Sometimes the parent is driven by awareness of the big money out there. Parents want to make sure their kid isn't cheated, and then they try to make sure he gets the very best, and he has to perform. Go root and urge them to play better.
Coaches volunteer for their own reasons.
We don't train them. No parent can direct themselves to the game. Coaches hear kids communicate on the field and actually hear them laugh and enjoy the game. Warren is exploring the idea of producing TV public-service announcements for parents and possibly videotapes for youth leagues' sensitivity training. But do it carefully.