I get a lot of spam comments in my WP blog. Say almost 20-30 everyday. The comments are all being from various domains but with the same content like I should agree you with your point. You break it down so well Interested read! Can I link your post back in my blog, please? Awesome. I just digged it. Keep writing more of this sort. If you are also getting such comments then consider yourself as lucky Lol I get the url of such spammy comments and use Google to find out all the pages where I can find a page linking to that spam URL. You definitely will get 50-100 at the least. Those pages are obviously non-moderated because they have approved those spammy comments. Now it's your turn to spam all such SERPs. Lol Happy spamming.