[mvid]

If I walked into a store (meaning it was open, not locked), and the self checkout was broken, and there was no other checkout, no staff member there to collect money or explain how to pay, no jar saying “honor system”, nothing…

Then yea, I would probably walk out with my stuff, knowing I had made a good faith effort to pay.

[acdha]

That’s called stealing, even if you have a rationalization. Until money changes hands, you don’t have a right to someone else’s property and their permission is conditional on payment.