This online petition surfaced almost immediately as soon as news of Death Magnetic's brickwall mix got out. I suggest you add your name to the list; the petition currently stands at 5,700 and rising.
The petition simply calls for Metallica or Warner Bros to re-mix the album, replacing the current, flawed release with a clean version. This is also an effort to raise awareness on the issue of "the loudness wars," and put an end to this sorry practice of sonically destroying CD's.
I don't expect this gesture alone will change matters with Metallica or Warner Bros, but it is one of many voices on the internet, helping to spread the word among fans and music lovers. This backlash has been almost entirely generated online, and it continues to grow through message boards, blogs, video and social networking sites. The Long Tail is being called into service against the music industry's loudness wars; at this point, anything is possible.