FOSS seems to be the best, if not only, solution. (As usual, when it comes to freedom and privacy...)
replies(2):
You could even make a printer with open source hardware - something like this, but higher resolution: https://www.youtube.com/watch?v=zX09WnGU6ZY, or think http://reprap.org/ - home made 3d printers made only from commonly available and 3d printed parts.
You'd think so. After all, Stallman created FSF in part because of his frustrations with a printer!
> In 1980, Stallman and some other hackers at the AI Lab were refused access to the source code for the software of a newly installed laser printer, the Xerox 9700. Stallman had modified the software for the Lab's previous laser printer (the XGP, Xerographic Printer), so it electronically messaged a user when the person's job was printed, and would message all logged-in users waiting for print jobs if the printer was jammed. Not being able to add these features to the new printer was a major inconvenience, as the printer was on a different floor from most of the users. This experience convinced Stallman of people's need to be able to freely modify the software they use.