http://www.informationweek.com/news/mobility/RFID/showArticle.jhtml?articleID=164302282

This Article describes the disadvantages of using RFID on items. If an item is leaving the store there is a sensor at the entrance that charges your products on your credit card. You don't have to wait for the casher to clear your products. You can just walk away with the bag and you have already paid for the item. Bob Evans a reporter says, "Among stores that moved the product from stockroom to shelves before the promotion hit, average sales were 48% higher for it than those that did so after the promotion's start." The price for the RFID has increased which affects the Economic status of the shoppers.