I'm snipping in the interest of brevity, but I will reply to your entire message.
All I can tell you, is that you and I have had very different experiences with beaches. The description you gave above would apply much more accurately to the "main" beach where I used to live than to the nekkid beach my GF and I used to go.
The folks who went to the nude beach were mostly kind of aging hippie types. The were some gay couples, but nobody was jumping around with tassels or showing off their bodies -- their bodies usually weren't all that great to begin with. The people who wanted to show off their bodies were the ones who put on the thong-backs and the tiny little tops and the speedos that call attention to everything that's underneath, and then they bought a bunch or beer and went to the main beach to be looked at and admired.
As far as cleanliness goes, there was no comparison. At the end of any given day, the main beach would be an absolute trash heap. On the nekkid beach, you'd be hard pressed to find so much as a discarded gum wrapper. That was one of the nice things about it.
There was probably some voyeurism. I won't deny that I gave an extra look to a pretty girl who walked by. But that was no different than what people do at any beach.
One important difference that I neglected to mention in my original post which I think is relevant to the question of perverts and child molesters, is that you rarely ever saw any adolescents at the nekkid beach (fully-dressed, 19 year old boys excepted). For the most part, the people who went there were age 30 and above. There were some little kids, but as they grow older and their bodies start developing, my impression is that they tend to get modest and don't want to go there.
For this reason, it was certainly no farm for a child molestor. You might see a toddler or two running around in the surf or playing the sand with no clothes on, but there really weren't all that many of those. And, like I said before, anyone who tried to grab one would have been instantly set upon by other people. Those things just simply didn't happen. It wasn't at all like that.
I am rather curious whether the beaches you went to were pay-to-enter or totally "free". There were a couple free beaches up the road from us that didn't have such a great reputation. We tried them out a couple times, and we didn't especially like them.
The main problem was the stupid punks who would go there and get drunk and want to look. I can also recall seeing one couple having sex behind some logs. This was more like the beaches you describe.
The pay-to-enter beach was much different. It was clean, and there was virtually no nonsense whatsoever.
Still, between the three, the worst by far was the main beach. That was the cesspool of sexuality, drugs, filth, and so on. The pay-to-enter nekkid beach was a great relief from that.