SCD - I'm behind you on all of this. Good post. That's not crossing any lines that I see. The tipping point is whether parents are doing favors strictly for the purpose of getting paid back. Is there an ulterior motive? I see a lot more of that in high school football in the South. Booster buys the team some expensive equipment. Here's a softball example - Got a friend who has hired the high school coach to be his middle school daughter's hitting coach, and he's become close to the coach. That's fine, but did that happen naturally, or is it an attempt to make it very hard for that high school coach to keep his daughter off the varsity? I don't believe in playing that game.
I was not always this way. Back in early 12U I was way too intense, and personally hurt my DD's chances. Once I realized I was at fault, my behavior completely changed.
I can understand completely what these younger posters are going through. I was just like it.
One coach became an enemy early. My DD was shorted. I changed, and this coach has now been one of the most instrumental in developing her play, and coaches her today.
So parents ... people can and do change. I was awful, and now am one of the better parents. You see that change in about every parent from 12U where arguments are more common. To 16U or 18U where most everyone is civil to each other. Treating the game as it should be, a spectator sport, and watching the DD's compete under the sole guidance and development of the coaches.