I have to agree with 1201alarm. At least on the 737, it would have made more sense to position the door aft of the forward toilet. It wouldn't have been too difficult to connect a hot water boiler for tea/coffee at the same time. Have a hatch to allow crew meals to be served, and the area becomes self-contained and secure. But at the same time, I'm also puzzled about the problems raised by having cabin crew in the flight deck when the pilot is out. It was SOP with both the companies I worked for post 9/11.