Re: Motherf***ers. I strongly doubt this is the only HP that has done this.
The Lexmark idiots try to use the DMCA against third party cartridges, until it was pointed out to them that copying their encrypted code without decrypting it meant there was nothing violating the DMCA (because DMCA punishes decrypting of code), all the decrypting was done by Lexmark's printer on behalf of the user, and there was no copyright infringement because the Lexmark printer wouldn't work if Lexmark's code wasn't there, so the cartridge maker couldn't write their own code.