All you need to do is recode the RFID chip and walk through the self-checkout isle. Big Brother? Meet the annoying friend of a second cousin who eats all your food.
http://news.com.com/RFID+tags+become+hacker+target/2100-1029_3-5287912.html?tag=nefd.top
http://news.com.com/RFID+tags+become+hacker+target/2100-1029_3-5287912.html?tag=nefd.top