def down_vote!(votable)
      begin
        down_vote(votable)
        success = true
      rescue Exceptions::AlreadyVotedError
        success = false
      end
      success
    end
def down_vote!(votable)
      begin
        down_vote(votable)
        success = true
      rescue Exceptions::AlreadyVotedError
        success = false
      end
      success
    end
Down vote a "votable" object without raising an error. Vote is ignored.