But equally, why couldn't you say, "Why not"? It may be perfectly valid to hold the point of view shared above, but if implemented I'd say it was a website, not a blog. Surely the entire point of hosting comments on a blog is to allow a discourse to take place - which other visitors can follow or add to if they wish. Expecting visitors to trail around the internet to read other people's points of view about the post seems to me to be a retrograde step.