[greglindahl]

Ask people who work in any field that does have blind review, and they'll tell you that it isn't actually blind... you can make good guesses on the author list by examining the description of previous work, the reference list, the style of the writing, etc etc.

[monadgonad]

It's still better than nothing. You can't reject a paper saying "I believe this author is X, who has few publications in major journals" which encourages people to assess the paper on its own merits, even if it doesn't ensure it.