Okay... why?

Apparently, one of the Swiss cantons has a problem with naked backpackers hiking through their lovely terrain. (Pic NSFW at strict businesses)

Alright, fine, nudists do lots of outdoorsy things. I understand that. But for gods' sakes, why go BACKPACKING naked in the MOUNTAINS?

Chafing!
Bugs!
Sunburn!
Chafing!
Sticks in uncomfortable places!
Stupid tourists with cameras!
Yet more chafing!

... some people.