I posted this long ago.
There should preferably be a second FD access door to prevent follow-through.
I found a reference to IATA considering this but now I can only find this article on the proposal:
http://www.nytimes.com/2013/07/17/bu...-security.html )
There should also be a third person on the FD so that there can always be two on the FD at all times. This 3rd person could be security instead of FC if necessary.