Well, I guess there's a good reason for it, but I've often wondered what the purpose of having a, "Very poor in content with writing skills bordering on illiteracy" option was good for in the first place. I mean if the story is that bad, shouldn't the author be advised to have another look at it, or have someone else look at it, before submitting it again?
I have seen a few stories' ratings slapped down with rock bottom scores but I've never actually read one, on this site, that actually deserved it. It's always a case of the reader being offended by something in the content of the story, or even more strangely the entire story. I mean, the codes are clear, so why do they even both to click on them in the first place?