The forest service has been on a witch hunt on these things. The two kids who were arrested for building some of the structures must have been idiots. There are something like 30 huts around Winterpark, I know of maybe a dozen and I have no idea who built 'em. The Crested Butte sheriff equated the priority of busting the smoke shacks with getting cattle off of the road.
There are shacks located around some of the backcountry areas in the state too. Loveland and Berthoud Pass both have shacks at various spots of the mountains. Of course I doubt the Forest service is interested in tearing these down as they can't take a lift to get there.
Anyway, the shacks are not supposed to be there, so if they want to tear them down fine. The witch hunt that is going along with it, is uncalled for.