I used to keep a file in my emails called "Author Beware"; typically these were emails I received back from authors condemning me for my rejection letters, insulting my abilities, accusing me of theft, etc. I haven't added to that file in a long time, not because I don't feel a need for it, but because I don't get that many accusatory emails anymore.
I'm often asked if I think my blog has made a difference with writers, and while I'd love to take all the credit, there's no way I can. Blogs like mine, Miss Snark, Nathan Bransford, Janet Reid, Kristin Nelson, Moon Rat, Dystel & Goderich, Pimp My Novel, Rachelle Gardner, etc., etc., as well as Twitter and writing groups have collectively made a difference. Query letters are better every day, stronger and more concise, professionalism has gone up tenfold and, frankly, this is all making my job harder.
When I go through my queries looking to reject those that are easy to reject—obviously not ready for publication—there aren't as many as there used to be and, because queries are stronger, it's easier for me to request material, harder to reject.
So kudos to you authors for making our lives harder by doing research and paying attention to what we're saying.