In reply to alec roberts:
Hi Alec - I was up there with a party on Saturday around 3pm and found it open. We cleared all the snow out, and chipped the ice from around the door, allowing the door to be properly closed. We left it secure.
Bloody annoying that folks cannot take the time/effort to do likewise!
The only pleasing thing was there was very little litter in it, (we carried off what was there).