Giving Feedback or Writing Reviews of Bad Stuff
http://www.meryl.net/articles/archives/003353.php#003353

Evans, Meryl K.
Meryl.net
2005

Abstract:

Some book reviewers say that when they don’t like a book, they simply don’t review it. I’d love to take the easy way out, but when I think about it from a reader’s perspective… I want to know when a book sucks.