Spammers are always looking for where to dump their suspicious spam links. They do it on forums and there's nothing stopping them from doing the same thing on blog posts. It's why I'm all in support of moderating all blog comments. Once the poster have proven not to be a spammer, the moderation on his posts is removed.
Do you moderate comments on your blog posts or just allow your visitors to post at will?
Do you moderate comments on your blog posts or just allow your visitors to post at will?