Scenario: You make a new deed over a formerly deeded site. Turns out people logged out there and quit the game for various reasons. After some time goes by, you have your buildings/fences up and locks are in place. Then one or more of those people decide to start playing again and discover they are locked inside your buildings or fences. Would be great if they could just wander out, but not back in again, letting the deed holder maintain security, without trapping the former deed holders.