When I was a kid, (we are talking a long, long time ago,) swimming pools were a new thing and Community Swiming pools were really new.
Our fathers had to deal with bicycles.
Then someone invented skateboards and Hula Hoops.
Every generation has had their fads, and the City Fathers had to cope with these new-fangled things.
Now we have Skate Parks, with all their perils and dangers.
(We have a lot of Skate Parks, out here on the Left Coast!)
So we have to make choices;
We can ban them,
We can make every child and their parents sign disclaimers,
We can, (i don't know a third choice)
But the families will move where there is the most/best family facilities!
If you're worried about the lawsuits;
I have it on good authority that the Supreme Court is going to render a decision that say that everyone is responsible for their own actions and the consequences thereof.
It's going to happen! I know it's going to happen!