Earlier today, I used my credit card to pay for a purchase. As I handed my card to the merchant, he asked if I had used my card to purchase gas recently. When I said yes, he warned me that I should never do it again. He explained that technology experts have developed something that fits inside the credit card reader and copies your credit card information. Another customer overhearing our conversation nodded in agreement. The merchant acknowledged that carrying cash to make gas purchases was much less convenient, but he cautioned me that I should never again use a credit card to buy gas. The other customer nodded in agreement again.