Defcon attendees use Facebook????
The door security latch can be defeated so why use it at all????
This gets less and less credible.
The device on the economy hotel door I used only two weeks ago could not be disengaged from outside - the clearances and design made that quite impossible. Shenanigans.
Of course the door can be forced with the metal security latch engaged. But all these stories are of people "walking in", NOT kicking in the door and taking the room by storm.