I didn't see your original question, so I don't know whether it was valid, but it also don't believe it is true that "there is no shadowbanning on HN". For instance, there are a few dead comments here from accounts that appear to be shadowbanned. I recommend turning on showdead. Every once in awhile I come across a good comment that is dead and am glad I have it turned on. I find that it creates very little noise.