This'll kill it.
"What is the mark? Well the mark Brian, is the barcode. The ubitiqous barcode that you'll find on every bog roll, and every packet of johnny's and every poxie-pot pie. And every [expletive-removed] barcode is divided into two parts by three markers and those three markers are always represented by the number six. Six-six-six. Now what does it say? No one shall be able to buy or sell without that mark. And now what they're planning to do in order to eradicate all credit card fraud and in order to precipitate a totally cashless society. What they're planning to do; what they've already tested on the American troops; they're going to subcutaneously laser tattoo that mark onto your right hand or onto your forehead." (Naked, British movie, 1993, directed by Mike Leigh and starring David Thewlis)http://www.av1611.org/666/barcode.html