Keep in mind this book is from 2006, think where they are at now with spying on us

Spychips: How Major Corporations and Government Plan to Track Your Every Move with RFID

As you walk down the street, a tiny microchip implanted in your tennis shoe tracks your every move; chips woven into your clothing transmit the value of your outfit to nearby retailers; and a thief scans the chips hidden inside your money to decide if you’re worth robbing. This isn’t science fiction; in a few short years, it could be a fact of life.

Spychips takes readers into the frightening world of Radio Frequency Identification (RFID). While manufacturers and the government want you to believe that they would never misuse the technology, the future looks like an Orwellian nightmare when you consider the possibilities of surveillance and tracking these chips embody. Combining in-depth research with firsthand reporting, Spychips reveals how RFID technology, if left unchecked, could soon destroy our privacy, radically alter the economy, and open the floodgates for civil liberty abuses.

https://www.youtube.com/watch?v=JZUPrCEoH8U