negative feedback buyers

I sold an item to a buyer with 'good' ratings, and they refused to pay, did not response and so on. I looked at their feedback and it was all positive, yet the COMMENTS were negative in some cases. I contacted EBay, and apparently a seller cannot rate a buyer negatively, they can only lodge a case through EBay if they don't pay. I did get my fees back, but the hassle made it a real pain, so what is the point of seller feedback? Kind of a farce really....