Buying something from a shop or bar and it becoming a non verbal transaction from their side.. For instance when you order say a pint of beer at a bar and they go pull the pint, put it on the bar then just hold a card machine in front of you. Not even mentioning the price, then walk off without a thank you or owt afterwards.
The do you want to give to charity button on card payment machines,I just want to pay for my fuel don’t make me feel like a bad person