Nightfire,
I think you may find that you indeed are quite wrong. You'll find that anything put on board FOR YOU is yours to do with as you please. That doesn't include chocolate given to the passengers and then left behind. But if it's on your tray or whatever you may eat it, bin it trouser it, it or throw it in the trash-your choice-it's yours.
Ryanair and their silly ways of getting everyone to pay for everythng are, of course something else. Perhaps you should fly with the nav lights off so that the electricity saved could charge your phone. Barmy, and what a subject to be discussing