It would be nice if this accident highlighted to the various aviation authorities the utter futility of making pilots go through airport security and have bottles of water removed etc. I am not saying all airport security for pilots should be removed but to impose the same restrictions on pilots as for passengers is clearly inappropriate. The present security restrictions can have an adverse effect on safety when it results in flight crew being heckled for queue jumping and results in them arriving at the aircraft late, frustrated and in a harassed frame of mind.
A suicidal pilot does not need weapons and could ensure total destruction of the aircraft whether he is alone or whether there are 2,3 or 4 people in the flight deck. I am not going into detail. As Nigel on Draft mentioned earlier a suicidal cabin crew member left in the flight deck with an unsuspecting Captain or First Officer can equally take over. No solution is foolproof.