I agree with Trailscout. There must be a group of nudists who can regularly "patrol" the beach for inappropriate behavior.
The thing is that as beaches are public domain, anyone can go there, nudist or not. Thoes who practice such outlandish behaviour are probably not nudists, just people who want to take advantage of the privacy of such beaches to do what they feel like doing.
Bob S.
"I think 'naked' is a word others came up with but we’re not naked; we are dressed in God’s clothes, the best clothes of all."
Emily Robbins