To avoid being tracked by readers, Mikey Sklar is showing how to build a faraday cage around your RFID tags. Just rip out a pocket from a pair of jeans and replace it with a cotton like fabric which contains enough conductive material to block most RFID tag frequencies.

Have a look at the PDF presentation of his project, it’s amazing to see how much RFID is present in our lives.

Movie of the pocket replacement.
Via de-bug blog.