I keep forgetting we are talking youth sports here as do most posters. This is youth sports for children. I guess you missed USL response to grade based teams. Specifically he was referencing Maryland where holdbacks are the norm in private schools at a young age. Have a grade base league in Long Island and my understanding is you have very few holdback children. So grade base in one area is vastly different from another area.

Nothing like teaching our children early how to get a edge.

"" Nor does it reinforce the fundamental principles of fair play and fun that are essential to player retention in youth sports.""
To most posters here it is fair play. They want the a benefit others don't receive and the edge its gets their son or team. And since the USL is vague on this subject. Its fair.