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B&W printing unavailable, please refill Cyan.
Scanning Unavailable, please refill ink.
Lol even better
There's a reason for that. It's so your printer can still print the secret tracking dots on every printout.
Uhh.. wut
https://en.wikipedia.org/wiki/Machine_Identification_Code
Edit: don't use a common ordinary printer when doing naughty things.
Uhh does USPS have a unsend option?
Fascinating. It's only for laser printers, but the real interesting bit is that they did it for 20 years before it was public knowledge.
Makes you wonder what other stuff they have hidden in devices we use every single day. Unless people start de-lidding the chips in their stuff and analyzing the circuits and dumping and analyzing firmwares, we are in the dark about the vast majority of our stuff that uses proprietary designs. One more reason to use open source hardware and software.