@amckinstry Whoa. It seems like such a obvious way to scam people. I guess it's a good thing to be very careful with retroactively updated or patched QR-codes.
However, the sticker in the picture is too small and not applied in the conventional orientation, so luckily that one is easier to spot.
@floppy @amckinstry I expect plenty of people don't realise that QR codes are supposed to always be in the same orientation, since the phone applies the transformation anyway