Walmart and Target have begun locking up underwear and socks - the latest items to be protected against shoplifters. As thefts have surged over the past year, stores have been increasingly keeping items behind lock and key. Target has underwear and socks behind lock and key in two stores in California - as the store battles annual theft losses of $500 millionTwo Target stores in the Bay Area - in Richmond and Pleasant Hill - have locked up underwear, NBC reports. He said: 'I'm calling for new legislation to expand criminal penalties for those profiting on retail theft and auto burglaries.' Pictures show the underwear behind plastic cases under lock and key at Target's White Plains store in New York.