on disabling drivers that use non-Free firmware

[Richard M Stallman]

    Somewhat related to this:  I've been toying with the idea of writing a
    desktop session daemon, technically similar to Ubuntu's "restricted-manager",
    but with a different purpose:  detect devices that require non-free firmware
    (based on bus id heuristics), and display a message explaining the user why
    these aren't supported, and discouraging him/her from buying hardware from
    this vendor.

It sounds like a good idea, but is the necessary information available
to do that job?