One of the "cheap prescriptions here!" web sites spammed by blog. They posted an 80-line advertisement as a comment to one of my messages trying to sell items to enhance portions of my anatomy, along with dozens of links to their web site.
I followed the web links and found the parent site. I sent nasty e-mails to their President, webmaster, sales, and tech support e-mail addresses suggesting that some alternative methods of marketing might produce better results without alienating people so much, but the e-mails all bounced after a few days.
I don't have any automated tools scanning the comments. I hope this doesn't become a habit.