Child abuse.
I've given you the example: your daughter wants to play soccer, so she gives her birth certificate and physical to the team to clear her to play. Your daughter does so well at soccer that she makes enemies on the field...her opponents, her opponents' parents, her own jealous teammates. Or maybe she has nothing to do with it, and some spiteful person is harming your child in order to get to you. So your daughter has to submit to a genital inspection because the BC and physical she used to clear her to play are alleged to be forged and faked so that your daughter could dominate the sport.
That's why every single allegation will result in a genital inspection.
Sounds like a great way to discourage participation in sports. I would refuse to let any child of mine participate if such an inspection was a condition for him/her to play.