I think it would be nice if there was an incentive for improving posts with a negative vote count.
For example a badge named "Gifford" awarded for a change of vote count from negative to positive on 5 questions after editing.
William Gifford is claimed to be the editor of the works of Jane Austen, whose hand-written prose featured “a powerful counter-grammatical way of writing” and “a limited range of punctuation” quite unlike the beautiful prose we know and love today.
Sometimes perfectly good questions get negative vote counts simply because they are poorly written, or have the wrong question in the title. I therefore propose an incentive for improving such.