We need to make it known that this abuse of the First Amendment will not stand, we will not sit by and just have "nerd rage", we need to strike fear somehow in to those who think that big media has all the rights (and I am a free market supporter).
Mike near the end of your post when it talks about there being no public domain lobby gave me an idea,
why doesn't someone try and get the EFF, Archive.org, (I would thinkthe ALA would also support it) et al to form some mega public domain lobby tasked with defending and expanding the public domain, it seems that having the groups fragmented has only hurt it. Maybe try and get some biggers names like Google in to the mix.
The pro copyright board has the MPAA and the RIAA and a few others why not team up and fight back in a unify front, that way the lobby *may* even have funds to fight back on ways that would reach non techy people on TV, print, and radio.
"Reasons to buy" could mean just supporting them because you enjoy their content, I'm not really familiar with Monty Python, now I could watch one of their videos or movies form the comfort of my home when I want to (no needing to worry about when it's on TV, or renting it). If I enjoy the video and their work I will be more inclined to support their works.
You really are not watching it for free on PBS, you're paying taxes to PBS to keep them running, and if you donate to PBS. Also the small "sponsored by" clips before and after shows. Most DVDs also contain extra things such as making of... and alternate/deleted scenes, which I don't think would show up in the youtube videos.
Think of it now more of a donation to Monty Python then buying the DVD to watch their video with out pirating.