[csomar]

> I’ve definitely walked out of a supermarket with a bottle of water that I picked up while shopping and forgot to pay for - I still stole it, even if unintentionally.

You only steal it if you realize it and don't return back to pay. Happened with me a few times, the cashiers will really appreciate it.

[freeflight]

Does that also apply when the cashier gives you too much/not enough return cash?

A while ago my to-go order from McD somehow included an extra cheeseburger.

Was that maybe a "present" by the company to a loyal customer? Should I have gone back and paid for a cheeseburger I never ordered? But if I give it back to them, they would just throw it in the trash anyway because they can't sell it to another customer.

[_carl_jung]

I did this with an entire rucksack full of groceries once when I was tired and used the self-checkout. When I came back the cashiers expressed surprise that I even did!