The W3C must ultimately do what it thinks is in the web's best interest. Not the interest of big media companies, or the interest of those against DRM. If they implement a system by which DRM can be reasonably added to the spec to bring those users and companies into the fold, I don't think I'd have much to call them out on, even though I don't like DRM. That bone is to be picked with the media companies themselves.
The W3C will ultimately do what is in its members' best interests: it's an industry consortium.
Its members are whoever paid the membership fee.
There are plenty of instances of the W3C doing things that its members asked for that were either irrelevant to the web or detrimental to it, because there is no "W3C" per se when it comes to getting stuff done, just the set of members.
