I have a data point about structures at EOT. A few months ago, the telephone box at EOT was attacked. The door was badly damaged, and the lock was rendered unusable. The miscreants evidently thought the box was full of gold bars, given all the work they went to in their effort to gain entry. Once they succeeded, they didn't damage anything. I have since replaced the door and installed a twig in place of the lock.
I think there are two alternatives at EOT:
1. Install a locked door and expect the building to be damaged.
2. Have an unlocked door (or no door) and expect the building to be used as an outhouse.
I think it should be kept at Sheepscot.
-John