Radio-frequency I.D. (RFID) tags are a convenient way to track items and cut costs for companies. But this technology is increasingly being used to track other things, like security badges or even people, giving it the potential to cause a horrific erosion of privacy. RFID tags can be read by hand-held scanners to track inventory levels and keep a better eye on loss prevention. With Wal-Mart publicly embracing RFID, you’ll see other retailers quickly fall in line.”]
Source: https://www.csoonline.com/article/2231436/the-next-big-privacy-concern–rfid–spychips-.html