Genius. I've always wondered how many people actually take the time to scan QR codes on posters and such. I mean, don't companies track QR code scan-through rates?
Which is the conventional wisdom (no one scans anything) but its not actually correct. I've done some QR tests which have picked up hits (not huge mind you but non-zero). There was also the story of the guy[1], on Sharktank, where one of his props was a QR code and he picked up customers who scanned it (from their TV) while watching the show.
It isn't common, that is for sure. And the bar code folks don't make it easy for folks. Simply publishing the bar code database would be a huge 'win' for barcode adoption.