As for shadowbanning being a key tool in managing a community - In HN's case, I imagine any shadowbanning system could be easily defeated, as a malicious actor could create a new account for every comment.
> As for shadowbanning being a key tool in managing a community - In HN's case, I imagine any shadowbanning system could be easily defeated, as a malicious actor could create a new account for every comment.
New accounts have no history and no score, so they fit into the community in a (justifiably) low-reputation place. While you can do that, you'll have an army of "greentext" accounts and the community tends to downsample their opinions.