If I needed to obtain a "blade" on board, I'd smash the mirror in the khazi or rip a metal strip off the side of the seat. If you fly some airlines, you may even find that the metalwork conveniently falls apart as soon as you sit down.
Removing all the litter bins at railway stations didn't stop the IRA... "Sweet holy mother Patrick, there's no fekin bin on the platform so oi've been foiled by those crafty fellers so I have ....... and now oi'l have to take me bomb home".
Perhaps passengers should be knocked out on pushback and revived after touchdown, it would certainly make SYD - LAX bearable
