Silliest use of a QR code yet?

QR codes, or Quick Response Codes, are popping up all over the place, even if they are only seemingly used by luvvies in the likes of marketing and advertising who are keen to show off the status symbols that are their smartphones.

Whilst I have seen some clever uses of them, there are also some very silly ones - and this one must be the worst I've seen so far:Not only is the QR code displayed on a poster that tells you to keep your smartphone hidden, it's also on the London Underground - where there is no Internet access, and hence the QR Code won't work.

Clever!

PS Yes, I'm aware that WiFI Hotspot access is coming to the London Underground so it will work in future, but in the meantime it's pretty pointless to put a QR Code on a poster on the Tube.