I just saw this road closure at Land's End on Facebook on one of the Bville pages. It can't hurt, and maybe will cut down on the yah-hooing going on out there.
By the way, I've seen a few comments implying that the local folks (whomever that might be) are leaving those tracks in the mud and salt. Yeah, maybe - but I've met enough Wendover residents that say "I've never been out there at all" and/or "I know about the mud, the salt, the price for a tow by the Salt Cat". I tend to lay most of the blame on travelers.
Suum cuique.