Mooney, for Gods sake GROW UP.
You don't know WHY the door was open, do you? Maybe coffee for the crew, or maybe a "physiological break" (both of which are permitted by our own CAA).
Oh, and guess what... all the Sept 11 aircraft had locked doors as a matter of SOP. Didn't stop the subsequent events, did it?
Back when you were in nappies, the rest of us were only too happy to keep our cockpit doors open (especially on small turboprops). The passengers liked it, you see. Nothing ever happened.
Now, one of the greatest pleasures in flying (inviting non-pilots to sit in the jumpseat) is lost to us forever. It made their year, and it made us very happy to make them happy.
So please, a little less of the self-righteous indignation, OK? it is misplaced and offensive.