Believe me, the publisher still hasn't to reconcile the work and tweak it when it comes in. Have you ever tried to edit a book from N authors? Even if they're using the exact same style file, there are always issues.

But again, go start your own free journal. People have been trying it since the Internet began and the best we get are some glorfied FTP server. Yes, this is all that some branches of science need, but there's a reason why Elsevier is still in business.