For example flapjacks sold on board for £1.50 are bought from supermarkets for 30p each.
Harder to argue against this one than the others.
Newark - don't think it was you as you seem to limit yourself to the consumables. Whoever it was was could have opened up in Vegas as David Copperfield's successor, considering the amount of stuff he made vanish.
There was a long rally between him and someone whose family owned hotels and who therfore took it personally. The miscreant stuck to his position that the towels were his because the room rates were so high and the most surprising thing was that the central theme didn't become "Well, why do you think those rates ARE so high?"
Must've been two threads.
I think soap and shampoo lie below the mythical bar of theft.