This is a case of how renting a shortened URL can go badly wrong. Heinz created a QR Code campaign that used a URL shortening and tracking service. What they forgot to check was what would happen once the campaign was history and whether the URL connected to the QR Code would be used for some other purpose in the future.
What could possibly go wrong? Take a look at this BBC article.
I cover the issue of how to manage dormant QR Code campaigns in my ebook, The Definitive Guide to QR Code Marketing.