Well public nudity is illegal, so maybe they should start enforcing the law and arrest those people if children are present…
In New York, there are several exceptions -- participating in a play, an exhibition, or some kind of protest.
They get a permit for an artistic exhibition, it is legal as long as there is no lewd or overt sexual conduct.
I would not bring children.
If parents want bring their own children, how is it any of my business or your business?
Some apparently have family friendly sections. If it's me; I would want to know how they define family friendly.