[going OT a bit] Possible threat?

[David Fletcher]

Further, you really can't trust anything these days.

Can't remember what they're called, they're those square block label
thingies that you're supposed to point your phone at. Apparently the
bastards have now started making up their own code blocks on sticky
labels and plonking them over legitimate ones on advertising hoardings.
So, don't be tempted to point your smartphone at adverts you're passing
by on an escalator. You might find yourself infected with malware or
being offered fake ED drugs instead of viewing that prestige car site.