Yeah a QR code is normally black and white, and that’s the machine-read bit that gains you entry. Congratulations and all that.
But you don’t have a monopoly on brains, and people will justifiably have thought about stuff that never even occurred to you when posting this shit. Like whether there could be coloured elements elsewhere on the printed page as some kind of security check, making it easier to trace the origin of forgeries or duplicates, and making black and white prints unacceptable (I guess that's not the case, but it’s not ludicrous is it?) Or whether colour printers produce black in a different way to mono printers (they often do) and that it might affect the scanners (it shouldn’t). Or if they haven’t yet received their ticket, whether the QR codes are coloured (such things do exist, but the colours don’t matter).
Lots of people are still unfamiliar with stuff like this. It’s not a sign of their stupidity or inferiority, and definitely not a signal to you that it’s OK to take the piss on an occasion like this.
PS this doesn't even affect me.
