Lockable Doors

I was thinking about my new house, I added some locked doors, then I thought, how cool would it be to have a lockable really global door? The door would be named something, and when you say /lock doorname or /unlock doorname the door would lock and unlock globally? What I mean is if you lock your door because an angry mob's coming to kill you but you don't know when, you can lock it right now and it'll still be locked when they arrive. Right now if you have a lock and unlock button they can just leave and come back and the door's unlocked.