Parents are a plague on youth sports

I have many, MANY stores from when I played basketball and then when my son was in track and field and we traveled for it, but on a more every-day level we have a single Mom friend with a girl who is now 18 years old. Her name is Ella and Ella was NOT any kind of athlete...at all. But she got onto the girl's basketball team because it was a horribly small program and she was the 12th and last person on the team, she's a big girl so I'm sure the coach thought she could grab some rebounds in 3-4 minutes of mop up duty in blowouts. My wife and I went to a few games to support her....Ella's Mom would sit in the stands and yell 'Ellllllaaaa!' sporadically throughout the games she got in. No context to the yelling, never when she got a rebound or the mere seconds she might be dribbling the basketball, just completely at random. Loudly enough that other parents would turn around and look. She then would talk to us loudly about how Ella was going to be getting basketball scholarship offers. This Mom never played sports and has 0.0% knowledge of anything basketball scholarship related. None. I was embarrassed for her because she making a complete fool of herself AND misguiding Ella big time that she was better than she was....which caused Ella to be dissatisfied with her playing time because her clueless Mom put it in her head. Poor thing, quite honestly. What she did was ruin Ella's enjoyment about being on a team with other girls and the camaraderie.