New York Times: The curvy mannequin piqued the interest of a couple of lanky teenage boys. Little did they know that as they groped its tight maroon shirt in the clothing store that day, video cameras were rolling. … At a mall, a father emerged from a store dragging his unruly young son by the scruff of the neck, as if he were the family cat. The man had no idea his parenting skills were being immortalized. … At an office supply store, a mother decided to get an item from a high shelf by balancing her small child on her shoulders, unaware that she, too, was being recorded…. These scenes may seem like random shopping bloopers, but they are meaningful to stores that are striving to engineer a better experience for the consumer, and ultimately, higher sales for themselves. Such clips, retailers say, can help them find solutions to problems in their stores — by installing seating and activity areas to mollify children, for instance, or by lowering shelves so merchandise is within easy reach. … Privacy advocates, though, are troubled by the array of video cameras, motion detectors and other sensors monitoring the nation’s shopping aisles.