^^^ yet, the whole point of these pointless rules is that they are not enhancing security. They are yet more layers of pointless procedures that do nothing but introduce new risks into the equation, another person alone with the pilot who has no flight training, this could be a distraction or worse, a way for dubious types to get access to the flight deck with minimal training or checking.
The best way to prevent further incidents like this would be to remove the bloody door altogether and replace it with a locked but breakable door, if someone attacks the door leave it to the crew and pax to defend it, if need be though it can be broken down.