Listen to this scam.
I stopped at a Starbucks kiosk to get my kid a juice box the other day. When I paid for it by card the card machine prompted for a tip, 25%, 20%, and 15%. Here’s the kicker, 25% was selected by default! You actually have to use button on the machine to move through the selections to get to NONE. To top it off the lady behind the counter casually said, “Oh you’re using a card? Just press the green accept button when the menu comes up.” which would have selected the 25 option.