Would there be liability lawsuits for this happening on public land? Might it be more a matter of them not wanting to do body clean up once a week?

They probably don't want to deal with the bodies either. One man's thrill seeking is another man's lasting psychological trauma.

then we need tort reform to address the root cause. This is so silly and unfortunate that wild spaces are litigated and made illegal for things that are normal and wonderful elsewhere.