Spam on this blog

A few days ago somebody posted a comment to this blog.  It was just advertisement for some crap I already forgot what it is.

I'm puzzled.  That's very different than sending spam e-mail.  How many minutes did that guy spend writing up that piece of shit in this page?  Cause he can't do it like with e-mail, just press one button and millions of messages are automatically generated.  And what are the chances that some annoyed reader will think:  Hold, this jerk is actually offering me some good stuff!  I'm gonna reward him with my money for having posted me that garbage!

I don't understand.  There're idiots in this world...