Sometimes not; depends on the coach and how objective he/she can be regardless of wins or losses. In an ideal world, the same person parents trust to educate and mold their children in the ways of sportsmanship wouldn't be the one to turn losing into a sour grapes vendetta against an official who was doing his job to the best of his ability. But then, I know we don't live in an ideal world.
Of course, the coach who may have just won and is grateful for the calls that went in his favor might not be the best person for the evaluation either...
Or the parents in the stands who want their kids to win and whose deepest understanding of the rules is, "we're supposed to get the ball!"
Or the players on the field who are competing not only with each other but with all manner of teenage struggles that may affect their objectivity...
Or even the other officials, who will probably not want to cause dissention amid the ranks and need to protect themselves from retaliatory bad evaluations...
