clear spray that distorts a license plate image — and helps drivers beat tickets for running a red light — is selling like hotcakes, despite a law banning its use. PhotoBlocker is being sold in eight New York-area stores and is getting "more popular every day," according to dealer John Ciampa. "Usually, I sell at least eight to 10 cans a day," he said. "The seven stores sell two or three a day. Then there's the Internet and the phone." When sprayed on a license plate, PhotoBlocker reflects the flash of a traffic-light camera, blurring the plate in a photo...