Even one broken knee would stop him from competing for a while and who knows, maybe a beating would convince him to give up this charade. Just saying, but maybe broken knees aren't the answer, but some backlash is needed in order to protect the girls.
These girls are being traumatized, life changing. I hope they figure out some way to band together to stop him from intimidating them. Turn the tables on these sickos, intimidate them. There is strength in numbers.
They could circle the guy and taunt him, or just circle him and glare at hm. Would that be a crime?
Maybe in this day and age, but anyway cowards can't handle much.

Too many are out there acting insane with no consequences
A beat down would wake some of these idiots up some on the other hand will need to be executed

I do not allow idiot behavior in public around me - I step up and put them in check because I can and They must know we the people will not be walked on anymore

I don't condone violence, but if they change the law then this kind of stuff won't be happening!

or if there are going to be transgender competitors, allow them to compete against transgender competitors only, that seems more fair! Especially since we have the Special Olympics!

Good solution, in a nice world where things are fair.
The girls are probably intimidated also by their coaches and other authority figures who are likely telling them that they have to allow the bum to play with them -or else!

Part of the reason we are in this mess is too many were allowed to behave like idiots with no consequences
Sometimes a wake up call of violence is necessary

The white hats are very very violent with these scum They are arresting and executing
There must be physical consequences for some
Had they happened earlier in life it could have steered these to not act out