Print.css — only display what's needed

I was expecting a print stylesheet which hides header, footer, img, nav, menu and object html tags among other. Which reduces margins and paddings, and set the font-size of the text and h{1,6} to something reasonable. Also makes text black on white if it's not already the case, in order to spend as little ink as possible.

Instead, this is a not-that-funny joke, which will actually waste paper because of the sentence that will make the printed sheet not reusable for anything else than draft paper (and that's for people who won't throw it right away... :-/).

Then again, telling people not to print web pages when it's not an absolute necessity is a very good thing. But this print.css thing is not the solution. I don't understand the upvotes.

The idea is nice, reminds me a little of that WWF idea of non-printable PDFs. [0]

But is something available that actually does the job? I remember this readability thing [1], is there something comparable for printing, too? Like a browser plugin or generic userscript...

[0] http://en.wikipedia.org/wiki/WWF_(file_format)

[1] http://www.readability.com