Dont be so naive.
Tesco ends trial of CCTV spy chip on razor blades
Alok Jha, science correspondent
Published on Fri 22 Aug 2003 10.30 BST
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Tesco has ended a trial of new technology that tracked customers buying Gillette razor blades.
The Guardian revealed last month that Tesco's store in Cambridge was testing tags which triggered a CCTV camera when a packet of Mach3 blades was removed from the shelf. A second camera took a picture at the checkout. Security staff then compared the two images, raising the possibility they could be used to prevent theft.
The retailer denied that the technology was being used for security reasons, but shoppers considered it to be an invasion of their privacy.
After Tesco's use of radio frequency identification (RFID) chips was revealed, protests were held outside the store and consumers wrote to Gillette demanding that plans to use the chips be shelved.
https://www.theguardian.com/business/2003/aug/22/supermarkets.uknews