I would like to comment from an officials point of view...
I had a thought back in 2018, I would become a certified USTA umpire, as an activity in retirement. It would be fun and could make a little cash. I only worked one USTA sanctioned tournament for the 2018 year. The anguish and abuse, I was subjected by the yelling parents/coaches with a few juniors thrown in during my first official USTA tournament, was not worth the money they paid me. To this day, I have not worked another USTA tournament, as a certified umpire.
Of course thinking back, I wish that my first experience working an official USTA event, was a positive one. Those incidents with the parents, coaches and players, if they weren't behaving badly, I may have worked more tennis tournaments.
Just remember, it is harder than you think to be on the field or court officiating/umpiring. It is pretty easy sitting in the stands, just being a well behaved fan.

Dennis, thank you for this piece. I have seen and known this was an issue for a LONG time. Unfortunately, I fear the adults who are at issue won't be the ones to read this article...or if they do, have the self-awareness to know they are the problem. Is there any way to get something included in the preamble for the games that makes reference to official abuse.

I agree with previous commentor, I've coached sports thru out for my son and considered refing but reconsidered it as I wouldn't get paid enough to tolerate the abuse and don't need to fear walking back to my car after a game. Frankly, I'd probably be fired because if fans got too toxic I'd just call the game and say "If we can't play nicely, we won't play at all"...game over.