QR codes on billboards and in marketing are kind of rubbish, but in terms of moving a URL or a phone number from your PC to your phone quickly, they're actually pretty useful.
On a big billboard beside the freeway, sure. In a home for sale sign, or in a bus shelter, or anywhere else where people are either a) very interested or b) captive, they are fantastic.
Because hey, I'mma scan this QR code, and then remember about it when I'm topside.
Keep your phone hidden (but check out this QR code!)
Instead of trying to scan that QR code (in a corner of a billboard), here's the URL: http://www.btp.police.uk/pickpockets/
OP's program removes 1/3rd of the steps, making it much easier for the user.