Excuse me!! Idaho at 8000 feet is not an equatorial beach. Anyone wandering around naked here is a durn fool. Has nothing to do with concepts, more's or puritanical principles. It is pure survival.I agree with you.
The concept of nude beaches are well-known, although they're not popular here in the US, so it doesn't surprise me that there's a such thing as nude hiking, and that everyone here would scoff at it.