Shameless plug, I wrote about this issue when the EFF resigned (may have some helpful background).
[...] Of all the lows in the W3C DRM process, the most shocking was when the historic defenders of the open web tried to turn an effort to protect the rights of researchers to warn billions of people about harmful defects in their browsers into an effort to advise companies on when they should hold off on exercising that right -- a right they wouldn’t have without the W3C making DRM for the web. Fascinating article. Here's to hope they can actually make a dent in DMCA 1201...What's more, they all implicitly agreed that DRM wasn't about protecting copyright. It was about using copyright to seize other rights, like the right to decide who could criticize your product -- or compete with it.