Interesting, but would it work.
It would certainly stop those shoplifters in their tracks if it did - the same ones that are being blamed for those high prices. Time will tell of course, along with those customers in Seattle in the US next year.
http://www.bbc.co.uk/news/technology-38212818
All views expressed are my own but you can express them too if you want to be right about everything like I am.
