def down_voted?(voteable)
      check_voteable(voteable)
      voting = fetch_voting(voteable)
      return false if voting.nil?
      return true if voting.has_attribute?(:up_vote) && !voting.up_vote
      false
    end
def down_voted?(voteable)
      check_voteable(voteable)
      voting = fetch_voting(voteable)
      return false if voting.nil?
      return true if voting.has_attribute?(:up_vote) && !voting.up_vote
      false
    end
Returns true if the voter down voted the +voteable+.