There is always a certain leap of faith that editors have made with their nonfiction writers. If the trust is broken, things can get very embarrassing for the writers and the publisher.
PERFECTION, n. An imaginary state of quality distinguished from the actual by an element known as excellence; an attribute of the critic. The editor of an English magazine having received a letter pointing out the erroneous nature of his views and style, and signed "Perfection," promptly wrote at the foot of the letter: "I don't agree with you," and mailed it to Matthew Arnold.
I think I'm equally as abusive as the editors normally are for the "Letters and Tomatoes" column, which is the fan mail part of MAD Magazine and an ongoing feature.