I'm sorry, but I feel that whole article is a joke. I can't see my being able to scan a QR code on my burger box, to find out the birth time of the cow that was used to create the burger, and what about Subway? Will they want to admit to the source of the soya that is reputed to be used to create half their chicken sandwiches.

Of course it could be useful to try to detect and stop those Mexican mangoe immigrants sneaking into the US.