Give the gun to the cabin crew!
No more gold cards 'demanding'an upgrade.
No more gargantuan wheelie bags/60kg strollers
No more 'attitude' from pax who
believe they are superior.
No more taking 5 drinks every time a bar cart passes.
No more demanding your coat is hung or suitcarrier stowed.
No more mobile phone use on taxi/inflight.
No more derisory looks when asked to switch off their laptops.
No more 'i'm a new parent, i'm precious' .
No more complaints over the lousy chicken sandwich.
No more scowls on boarding , they might even say hello.
No more drunken / abusive behaviour.
No more tutting when the captain says an ATC slot delay of17mins
No more leaving the washroom in a state.
No more handing you full sickbags.
No more total disregard for the safety briefing.
No more flightcrew grassing you for not giving them 'First' meals

No more newF/O's trying it onwith every blonde gorgeous hostie

No more fellow cabin crew being lazy during the flight
GREAT
Well, it could make life a little easier the wrong side of the F/D door !
Seriously though, as a last line of defence ,and with v strict procedures in use , could it not be the final deterrent??