People keep moving the goalposts and it never ends up making sense. The fact of the matter is that HN has moderation which people enjoy. You can't come in here talking about whatever you want, however you want. The same goes for Twitter. Trying to split them apart by size, audience or whatever is meaningless.
HN is a fraction of Twitter's size, and moderation isn't going to scale linearly. I doubt anybody, including Elon could really solve this problem apart from taking the reddit approach.
