Greywar,
As Gideon said, each of our blogs is our apartment. SO he has his and can do whatever he wants to in it. But when a blog is posted with a no comment, I dont read it. basically (my wife rails at me when I say that and calls me George Lopez!), that is a "No Solicitors" sign.
Let them have their rants. No comments means it is private to them. Let them have their privacy.