Oh, it is happening here, too. I blame ATVs. The property up the hill from me started shutting their gate because they were tired of ATVs tearing up the tundra. Most 4x4 drivers are pretty good about staying in their place.
Not so much with ATVs.
I'm not even sure if it is legal to gate the roads. Most of the area is private property, but the roads are county. I'll have a chat with the sheriff one of these days...
I've been supporting Colorado Off Highway Vehicle Coalition to try to get some education out there. I'd really like to think education will work better than fences.
By the way, I'm going to be in Fairplay this Sunday for their Burro Days. It sounds like they're going to stick me behind a radio all day, but you still might see my proton up there, if you're in the area.