I hate having to do posts like this, and to be honest I should really have a page that outlines these things but I can't be arsed. Basically, you can say what you like in the comments as I have made clear before, but I've decided on an exception.
If you spam link your blog, and you do it in ALL CAPS constantly, and if you do it in threads where your post has bugger all to do with the topic posts then your comment is going to be rejected.
I have no problem with people linking to their blogposts in the comments along the lines of "I wrote about this too here Dizzy and you're absolutely [right/wrong]". What I do get annoyed about is PEOPLE SHOUTING ABOUT THEIR LATEST POST ON NU-LIEBOUR in a thread about something completely different.
You now have three links in one post and you won't get anymore in the comments if you don't stop. Might I suggest making the font colour on your site green?