Another fun state: open the door, then turn the deadbolt. Now the door can't be closed! Attempt to close it hard enough and you can bend the deadbolt shaft. Now

Another fun state: open the door, then turn the deadbolt. Now the door can't be closed! Attempt to close it hard enough and you can bend the deadbolt shaft. Now the deadbolt can't be retracted, and the door is entirely disabled! An arcane edge case, but something a clumsy child could do in less than a minute. How could we tolerate such an awful design? Who is responsible for this catastrophe?