In addition to this blog, I write for/manage a company blog (the Brick Marketing Internet Marketing Blog ), as well as a blog on my internet marketing consulting site. I kid you not when I say that I can easily get 4,000 spam comments every day. Now most of those 4,000 spam comments go directly to my spam folder and I never have to see or deal with them. A lot of these comments are coming from black hat or overseas link building companies toting the benefits of natural Viagra and the like. Once I mark a commenter as spam, all their future comments get filed as such.