Once that's done, what remains is not serial downvoting, but downvoting done in accordance to the content - in this case the lack of information.
Our model kinda behaves similar to the golden rule of debates, which is "Never attack a person, only attack an argument". In this case, we look at posts and content instead of an argument but it's all the same. People can downvote your content because they feel it is unclear, lacking information, or demonstrates no effort. But once they start going past that, especially if what people say in comments starts to say things against you as a person, that is not acceptable.