Add the ability to allow (specific) others through Player Owned Doors.
This way you can limit the people who come in the doors but not totally shut everyone but you out. Basically you can add and remove people from accessing certain player owned doors. Maybe when you try to open a player owned door it says "You do not have the key to this door." but if you have been granted access to the door it says "You use your key to unlock the door."
I can see it being useful, but there is some overlap with the town doors. I suppose this would allow more fine-grained control.
so like a "friend only" door? sounds good. upvoted