LOL I get around 500 spam blog comments on one of my wordpress sites a week because i have comments enabled. None of them ever get approved of course.
Some webmasters like to waste time submitting to blogs when they never get approved and u can tell they are using a comment submitter because half of them are allways the same posts.
Note to webmasters: If you use a comment submitter make sure the sites you submit to have comments on auto approve otherwise you are just wasting your time
