I imagined standing there calling you to open my door but it seems an interesting security feature. You could even have a second front door and trap people. When one leaves they have to close the living room door before opening the front door. Say someone walks you up to your door at gun point to rob you or they attempt to force their way in. You can just tell them you cant prevent the call to the police and that the door wont open, we will be trapped in the hallway, I have no control over it.