I've had the idea of glueing a QR code that would load up the Rick Roll video on top of some ad's code (it was a big billboard on the wall of a pedestrian tunne

I've had the idea of glueing a QR code that would load up the Rick Roll video on top of some ad's code (it was a big billboard on the wall of a pedestrian tunnel promoting Munich/Bavaria's bid for the 2022 winter olympics), but never actually executed it...