Unfortunately, card info theft is a HUGE problem at gas pumps. There are two parts to the scam: first a pass-through card reader is placed over the original card reader. The pump will still work, but the info on the mag strip will be copied and stored by the device. The second part of the scam involves a small camera stuck high up somewhere, facing down toward the 10-key pad; that is used to capture PINs and associated zip codes for CCs. What tends to happen is that thieves will place these devices on a pump in the wee hours of the night when the station is understaffed, then come back a few days later and take them away.
That said, I still use CC's at gas stations all the time, but NEVER debit cards(Altough I do always eyeball the pump carefully looking for signs that "extras" may have been added). Getting a credit card straightened out after a hack is pretty easy, as long as you report it as soon as you see it, and you won't lose more than $50 if it happens. A hack against a debit account is a MUCH nastier kettle of fish, largely because the overdraft fees will bury you.
How much work is it to take the security tape with you and stick a new piece on when you replace paper in the printer? I mean, really.
