For a company like, say, 123inkt, the Dutch outfit that sells HP-compatible cartridges and first noticed the change, it's DRMaggedon. HP's at least upfront about it. Brazen, even!

HP printers with dynamic security that can be disabled depending on the date of manufacture: HP Officejet Pro 6970, 7740, 8210, 8700, Officejet 6950, PageWide 300, 400, and 500 printers.

HP Inc has been sued in federal court in Chicago by consumers who claim the company's printers would not accept replacement ink cartridges made by other manufacturers, forcing them to pay ...

HP sells printers that work with third-party ink now, but the company says it may update them in the future to "block cartridges using a non-HP chip or modified or non-HP circuitry from working in ...

While HP took its time getting back to me, I tried a third-party ink cartridge in my HP OfficeJet Pro 8610. Sure enough, it didn't work. Instead, I was informed that the ink cartridge was damaged.