This "grudge downvoting" shit has been a thing on HN for years, with Dang etc refusing to acknowledge it. Might as well join in on it yourself till they notice :)
It makes your comment [nearly] invisible to others, unless they have showdead. It can also limit the rate at which you can post. It achieves what spam-downvoters want, without any downsides to them.
Parent's comments are months apart. What sort of somebody did you have in mind?
Of note, parent's tag is "ask me anything and i will probably give you something new to think about." This is a bold promise.