One of my funny support calls goes something like:
Me: You have the track 2 field turned on, on the card reader.
Tech: No, I don't. I double checked it. It's turned off.
Me: Okay, is your name John Doe and do you live at 123 Flying Leap Lane?
Tech: ......Um, Yeah... How do you know that?
Me: Because the track 2 field is turned on and the ATM sent us the card information from the attempted transaction.
Tech: <LONG silence>...... Okay, I'll check it again.
I'm happy that I don't work in that side of the industry any longer.