When kids play sports, it's not the children who need to be supervised—it's the parents. Whether they're overbearing or living vicariously through their children, adults behave worse than their children at youth sporting events. Parents have proved time again they can't be trusted to check their emotions. They are ruining what should be a joyous experience.
Not every parent is a rage monster nutjob. There are parents who are genuinely there to support, rather than criticize. They shouldn't be lumped in with the angry lot and treated like they did something wrong. Good parents should be there for their kids. They aren't ruining youth sports.