When I was in Vancouver I was staying in the Fairmont Vancouver for the first half of the week.
Had a look in the minibar and found it had little switches underneath all the food and drink in there. I kind of thought they would measure the presence or absence of an item. In fact I got kind of fascinated by the switches and started... playing with them. I probably pressed the whisky switch a few dozen times as well most of teh rest of them.
When we went to check-out we had pages and pages of minibar expenses. Could have been an expensive mistake, but the hotel employee agreed with my reckoning that if I had drunk as much whisky as that I would not be in a fit state to stand, let alone check out.