Katherine Albrecht put together a fearless photo expos on the use of RFID tracking chips at Wal-Mart, and on various products like printers and TVs. She goes on to show how customers are electronically frisked on their way out of the store. All of this is "for your protection" of course.
Seeing these sticker-RFIDs does make me take another look at the Dorkbot dude who implanted an RFID chip in his hand and wonder, why on earth didn't he simply use a sticker?
Photos of Item-Level RFID Tagging Wal-Mart Super Center, Dallas, Texas October 15, 2005 [Spychips (via Digg)]