Spam, spam, spam, spam, spam…
In 2007, Raj over on BlogHash asked Why do spammers spam blogs?
Spammers should know that over 99% of the time their comments are taken care by anti-spam plugins like Akismet, 0.5% times manual intervention of a blog owner marks their comments as spam, and the rest of the time they succeed. When the success rate is below 1%, why spam? Why not spend that valuable time of yours to do something worth?
Even though it's two years later, I still know the not very PC answer: Because they're dumb! Thank you.