The largest QR code can hold up to 3 kb of data, which is more than enough to write a nasty virus in an injectable script if aimed at specific devices/apps. The main hurdle is breaking the app to execute the code instead of treating it as a string. It’s the Drop Bobby Tables joke. Developers hopefully don’t fall for this anymore.
Anyway. Making a shitty link and leading people there isn’t a new idea. You don’t even need a t-shirt. Hackers already place their own printed QR labels on top of otherwise real codes, and the user might not even notice, because they’ll be redirected to the right site after the dirty deed is done dirt cheap.
There are claims that the translation of the bible is wrong on this though.
https://bycommonconsent.com/2006/01/24/weird-ot-euphemisms-uncovering-the-feet/#%3A~%3Atext=A+good+example+of+this%2Cpart+of+a+euphemistic+expression.)
In short, feet might mean genitalia. I really have no opinion on it, but it makes a lot of sense. The purpose of even describing the submissive act of washing feet aligns well with the old Greek teacher and pupil relationships to present Jesus as a stand up guy who will go down on anybody, men or women, regardless of their status. He took your sins and such.
The message is the same anyway, so I suppose it has been whitewashed a bit throughout the years.
The reason why I want to believe it is that it would also explain why he was so popular that contemporary writers would bother writing anything about him.