What follows could either be a demolition site or a CIA plot. In one case a variety of tools are brought to the door and the lock is broken with great force. In another, more serious case, somebody would have to climb the balcony ledge from an adjacent room and scrape the PoP off the window to open it.
One friend of mine misplaced his keys so often that he finally put a tiny, one-lever lock which could be broken easily! Of course, he replaced it with a stronger one later. Luckily, such a thing never happened to me.