I actually spent 3 years doing research on the other side of the paywall. It is one of the things I'm "vocally critical" of. Here's me calling it evil just a couple of days ago: http://bit-player.org/2010/yet-another-spam-update#comment-2...
At any rate, there's not a single scientist who believes that publisher copyright for papers is a good thing. Unfortunately we can't change the system overnight. At least in CS, as I pointed out in that comment, it has already become a non-issue.