Depending on what your coworker actually intended to do, you might want to let them know that printers have features built in to make their output traceable, specifically intended for catching counterfeiters.

[–] newIdentity@sh.itjust.works 12 points 1 year ago* (last edited 1 year ago)

That's one of these things that sounds like a crazy conspiracy theory the first time you hear about it, but it's true

Edit: haven't actually clicked the link. I mean the yellow dots which the printer makes which is directly traceable to your printer: https://en.m.wikipedia.org/wiki/Machine_Identification_Code

Basically all printer manufacturers entered a secret contract with governments.