User blog comment:Wildoneshelper/Poll on difficulty approach/@comment-4189499-20131031000221/@comment-3225604-20131031045330

And I'm also convincing people who vote for option 5 to option 2, because option 2 is the same with option 5, but also involving unregistered users. However, option 4 should be opted for because that is the best way to prevent subjective information.