Years ago when my son was playing pee wee soccer, I think he was seven at the time, they had some of the older kids referee the games. So typically the refs were around 13 years old.
So one night we get to the game early, and my son and a kid from the other team are the only two kids there so far, so they start kicking the ball around together and trying to score goals off each other and whatnot, as kids will do, and I am talking to the other kid's dad. The coach for the other team gets there and comes over and joins the conversation, and says oh, by the way, before the game starts tonight the league president is coming by to talk to all the fans in attendance. Well that's kind of odd, why is he doing that?
Because during the game the night before one parent was so incensed that the 13 year old referee didn't call a foul when he thought that his son got fouled that he went out onto the field during the game going towards the kid who was reffing and yelling and cursing at him. So the league president was going to all the games before they kicked off telling everyone that if anyone so much as said one disparaging word to any referees anymore that they would be permanently banned from the facility.
As was said, parents, ruining kid's sports for decades.