Speaking of parents/kids having power. I KNOW of 2 Worlds bound athletes at a MAJOR bid competition, backstage right before going on the floor, waivers in hand, told the coach sign or we are not competing. It worked. Personally I wouldn't want anyone like that on my team and it would have screwed the other 34 other kids.
It's a shame when an athlete have to resort to this type of tactics and possibly hurt other teammates (by not competing) to get a stubborn gym owner to sign a release.