The other factor will now be the willingness of the other passengers in any future Hi-Jack to "get involved".
If you are on a hi-jacked plane now, the stakes have changed. You could well be fighting for your own and many other potential lives. I think that you will find that in future attempts the passengers will be much more willing to get involved in a direct way. Obviously the rumours about the bravery of the SLF on the Philly plane will do nothing but inspire. Would you do the same ? I like to think that I would.
Locking and securing the doors to the flight deck will ONLY work, if the crew refuse under every circumstance to open it up during a Hi-Jack senario. That means leaving all the cabin crew and SLF to their own devices, and simply getting the plane onto the ground ASAP.
That is obviously a massive re-think to the passive methods instructed of pilots today.
What would you do ?
How would you feel having landed a plane with a number of murdered passengers in the back because you didn't open the door ?
Should we assume that all future Hi-jacks are destined for building impact and should therefore ignore ALL demands from the main cabin ?
This is a tough subject. Giving up your responsibility to the cabin crew and SLF is not going to be easy.