If you guys really want to be floored, a crew installed ATM machines in a mall and when someone put in their card to withdraw money they would get an error message and just go to a different machine. What they didn't know was that the ATM would record all of the data on their card and save it including their pin. a few days later they world return to the mall with work clothes and a dolly and remove the machine. Their shirts would reference ATM repair or something. They would then put the data on a hotel room key card and go up and down the east coast withdrawing money from ATM's.
How did they get caught? The secret service figured they would be storing the ATM's somewhere and because they were pro's, they figured they wouldn't keep them at their own homes. They then hit every storage facility in every area that had an ATM in a mall and asked the managers at the Storage Units if they saw anyone with ATM's. Finally one guy said, "oh yeah, the other day". They found the unit, put it under surveillance and the rest is history.