Ha ha ha!!!!!

Best way to train the offenders is letting your 15kg cabin trolley fall on their feet!!!

I'm know an expert at aiming for the toes, and IT REALLY WORKS!!!

Wether in KA, CX and even MU the technique has earned me a lot of furious stears but ensures that my 'lebensraum' is not invaded.

Ussually KA, is quite good at keeping Y pax out of C, and so is LH, BA, OZ, and in F with LX I even got the C and Y pax redirected to the other aisle to let me peacefully disembark.
SU, TG that's an other thing. Not to mention MU, CZ, CA, IB (yes flights in Spain are very much like intra village buses complete with chickens and boxes of vegetables, not as bad as China but with a familiar flavour).

Get angry, never, just let the bag fall and then do as the frenchies do: 'desole monsieur'

On the other hand, once out of the plane, I can't bear F and C pax blocking the travelators, specially in destinations with long immigration queues like PVG. If you want to queue, right, but don't force everybody else into it. For such cases I'm considering to install retractable cutting blades on my trolley "a la Ben Hur"