@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 Unfortunately you could have a very nice professional-looking sticker overlaying the real one which was perfectly easy to spot, and many people would use it anyway assuming it was an official amendment/correction and not a scam.