Turns out pumps at gas stations are controlled via Bluetooth, and that the connections are insecure. No details in the article, but it seems that it’s easy to take control of the pump and have it dispense gas without requiring payment.
It’s a complicated crime to monetize, though. You need to sell access to the gas pump to others.
EDITED TO ADD (10/13): Reader Jeff Hall says that story is not accurate, and that the gas pumps do not have a Bluetooth connection.
Click to Open Code Editor