Also, Senator, try making a phone call from a hotel room. Check out the hotel bill add-ons for these outgoing calls. Far cheaper to trek down to the lobby with change or credit card and use the pay phone. And, Senator, you drop some coins into a snack-food vending machine, but then decide you don't want anything after all. The machine keeps your money and forces you to make a choice.
People riot over less.
Say you're at a self-service gas station. You get out of the car to pump gas. The attendant standing next to the pump asks if he can help you. You end up making two or three embarrassing trips before calling it a day, even though you're still hungry. I know it's not expensive, but, God, is it annoying.