Dickweeds who insist on paying the <$2 for their coffee and donut at the convenience store with a credit or debit card. Carry a few bucks in cash, moron.
Hey that's me! I never carry cash anymore, you can use your debit card for anything. Sometimes I buy gum just to get $20 cash back and avoid ATM fees. It's only slow when people don't know how to work the pinpad - and I'm a pinpad NINJA!
On a similar topic I hate walking into a gas station and they have the $5 minimum purchase sign. That's against the contract they sign with Visa/MC, you can't even set up the machines to process a minimum, they're just being cheap. You wanna process sometimes you gotta eat some fees. Also, the chuckleheads buying beer without an ID, then they want to argue with the clerk while you stand there waiting. Nobody cares how old you look, granddad, it's the law. How did you drive here anyway?