The positioning of Grey Tuesday is interesting, but somewhat flawed. First, this ain’t a censorship issue, it’s a copyright issue. Second, censorship doesn’t work, but copyright does.
Granted, not everyone wants copyright. For those who wish something more flexible, there’s Creative Commons. For those who don’t want to respect copyright, there’s, well, stealing. Stealing is bad. I like Creative Commons, and I dislike narrow minded lawyers, but that doesn’t turn this into something other than a legal issue, so it’s a matter for the courts to rule on this grey area (pun intended) of fair-use. I’m not sure a lot of coordinated stealing is going to influence the judges.