As all marketing trends come and go, you can bet there's a website/blog/tumblr/flickr stream/whatever to give it the proverbial kick in the pants on the way out the door. Enter WTF QR CODES. Seriously, you have to check it out.
"Crawl down here and scan this code, but for the love of Pete, mind the gap! TRAIN!!!"
In theory, this was a good idea:
"Load the app. Scan the code. Oh, and did we mention run alongside the bus? Yeah. That too."