Okay, That area is out of our land, so I don't see the problem.
Broly, WR owns twice as much as the SE does, if not more, and as you can see not all of it is developed. The only thing on that continent is the obelisk, which isn't even a town.
Residents should be reminded that any caves mined are Empire property, not the personal property of the owner of the house above. All citizens of the empire may enter said caves, unless signs posted by an official of the empire (Currently only a Consul) specifically bar entry.