Today a division of Macy's in New York said it will pay the state $600,000 and crack down on racial profiling of suspected shoplifters. It's to settle an investigation of complaints from black and hispanic shoppers. They said they'd been questioned, detained and handcuffed more frequently than white shoppers. As a law enforcement tool, racial profiling has been discredited not just as morally repugnant, but as inefficient, as well. And yet there is no denying that every day in stores, in the workplace, people make snap decisions based on impressions. These choices should not be ignored. So argues Malcolm Gladwell in his new book, "blink".