The Austrian CAA also approves operations with a "peephole only". There are Dash 8-400s operating in Austria that came with flight deck entrance surveillance cameras installed just to have the systems disabled in order not to have to stock spares.
This requires one pilot to get up and check the peephole whenever the cabin crew wants to enter the flight deck and one cabin attendant to stay on the flight deck when a pilot takes a leak in order to check the identity of the returning pilot.
Another goodie:
As the electric door lock fails open in case of loss of AC the checklist actually calls for the door to be locked manually (making it impossible to open from the outside). As if one would not have enough other problems after losing all generated power. Getting out of my seat to lock the door just to be locked up in case of a botched landing wouldn't be foremost on my mind under these circumstances.....