“Yeah, I used to buy a lot of code in an image (commercial purposes). We didn’t have anything evil behind it, but there was a lot there.”
First it was barcodes, then QRtags, then nfc tags ...
Well, fortunately, we’ll be able to still shop and relax at the grocery store. My pastor already went through these overseas, years ago. Probably in Singapore but he goes many places.
Walmart (and others) are now installing (this info is over 2 years old) systems to tie video to each individual receipt so they can look at your check-out video on demand. I even told this to a manager at a local convenience store (major chain I won’t identify). More than 3 years ago, he told me (weeks later) he just went to a class on it.
Meanwhile, back to grocery shopping - this is from many years ago. It’s coming; most likely RFID. I used to work with (and program) the printers that now have the this type of capability (notice he picks up packages of meat, which are always unique). No problem for the RFID printers.
https://www.youtube.com/watch?v=eob532iEpqk