My favorite online bloggy literary agent in stilettoes has two bits of advice for you:

Ways to really, really annoy a literary agent (i.e. print this up and put it on your bulletin board and check this before you put your query in the mail.)

and

"If you start calling reviewers and telling them they've plagiarized the back cover text in a review you're going to look like a nitwit. They won't give you bad reviews in the future...it will be MUCH MUCH worse."