A better idea.
[Warning: may contain irony/sarcasm: Unsuitable for US audiences]
Lock the flight deck crew in the flight deck.
The key is removed from the plane before leaving the gate.
The flight deck is unlocked after landing after all passengers are accounted for.
The axe is removed from the flight deck.
Escape ropes/ladders are removed, and escape hatches welded shut.
That way, the magenta line followers at the pointy end have more incentive not to crash.
For good measure, all crew property not immediately essential to flight will be carried in checked baggage.