Nigeldraft
All this does is shift the problem from pilots with poor intentions to CC. A CC member, locked in the Flt Deck almost has an easier task than a sole pilot to create mischief - especially considering the equipment in the Flt Deck.
It does not shift anything, Nigel, its been like this for years.
We used to put paper wedges in the door-lock so it would not lock behind us, when flying with certain f/os. The only difference is that people might start talking about the problem, instead of deleting 'troublesome' posts on blogsites and denying it in parliament and the media.