They can still be innocent at nude beaches. There aren’t any orgies there or whatever you think a nude beach is.
Creeps gonna creep. Only way to avoid them is to not go outside. And honestly who cares? Maybe I’m a bit desensitised, but if someone stares at me at the beach, why should I care? Same goes for the ones staring at children, with the difference that children don’t even worry about stuff like that. I also think you overestimate the amount of people who actually go there to creep. It’s not even necessary to go to a nude beach for that, I’ve seen plenty of naked kids at regular beaches.
“[…] because they don’t understand the severity of the situation.” What severity? What’s going to happen to the kids? Do you seriously think they worry about being sexualised? When I was a kid, we would run around naked in our backyard, lots of neighbours were able to see us. Did I worry about that in the slightest? Nope.
You’re worrying too much.
Because it’s proprietary garbage. If there are FOSS alternatives, I’m most definitely going to use them instead of proprietary software, let alone proprietary software by companies like Meta. And since there are plenty of those alternatives: No WhatsApp for me.