Personally I feel that only other authors should really be able to review stories. They'd then know how much time and effort people really put into their work.
That is like saying only painters should be able to visit art galleries.
I am not a writer, but I like to read. I have a right to post a review here, just like I can buy a book at a bookstore or buy a CD. That is one way I can say whether I like the story.
As a reader here, I should tell the author why I like or not like the story, not blame the story codes - you're right there.