Sure, it’s a public park and is paid for by tax dollars but it wasn’t put there to provide a playground for the school. If the school wants a playground, they should build their own. Imagine the law suits if a student gets hurt. Or what if a car hits a student crossing the road to the park. I can see the headlines now if some sicko grabs a kid at the park when the kid should have been on “safer” school property. No, there’s too many problems. Little kids shouldn’t leave school grounds during the day.
Given your concerns, no one should be allowed to use the park.
Totally seperate issue than a local council enacting a "resolution" to BAN kids from a park.