Hmm. Checking my spam queue the other day I found these two plausible-looking posts. When I read the first, I almost reflexively hit the “approve” button before two things happened. Firstly, the comment seemed very familiar. Eerily so. Secondly, my eyes tracked down the page and I spotted the second, identical post from a different “person”.
Ooop, not so fast Mrs. Spammer
So: reposting genuine comments as spam? Nice trick! Didn’t work, but full marks for effort.