I too have seen this all to often,once in a grocery store this lady in front of us argued about prices and sent the bagger back and forth to check shelf prices saying they were ringing up wrong. after about ten minutes or so the teller told her the price and she yelled food stamps and turned to everyone in the line and said yeah i'm paying with food stamps got her reciept and her hubby( we guess) pulled up in a new $50,000 customized van packed it up and pulled away everyone was shaking there heads.