Creative QR Codes
mashable.com
mashable.com
Firstly, you're eating up your margin for error. This seems fine when you're scanning with an iPhone 4 from a galley proof in a brightly lit office, or from your calibrated monitor. It becomes a big problem when users are scanning creased newsprint on a poorly lit train, from a dirty TV at the wrong aspect ratio, or with a crappy cameraphone with a scratched lens.
Secondly, you're pissing away the inherent call to action in a QR code. Many of these more styled QR codes are barely recognisable as such. Either you reduce your scan-through rate because people don't know that your multicoloured blob is actually a QR code, or you have to explicitly state "this is a QR code, you can scan it". I hope I don't have to explain why those are bad design outcomes.
If you hire designers, this is a brilliant litmus test. Anyone who thinks that this is a good idea is incompetent, plain and simple. They will make decisions which are pretty, but will annoy your customers and cost you money.
The Disney codes are cool - they are creative in a way that doesn't compromise the readability of the code. The others just seem like gigantically bad ideas.
It's hard enough convincing people to use QR codes - the more you violate the spec the more devices will stop reading it.
These examples are taking a slice of that redundancy and replacing it with a design. This is a bit like using typography to make a URL look nicer but harder for a human to read.
We're about to finalize our logo, and immediately afterwards, they'll have one more happy, paying customer.
I'm going to announce this properly sometime this week when we've got a nice demo video, but we just (and I mean JUST) launched a new webapp for people who want to have flexible QR redirects with analytics.
If any of you guys are interested: http://omniqrcode.com