That account exists purely to promote actions that would result in the destruction of the platform on which it exists. Expecting a platform to host that kind of content is unrealistic.
dang allows people to criticize HN as long as they confirm with the sites' general standards of behavior, for example.
Musk said he was pro free speech. That means including speech you don't like. So it should be more obvious than ever what he means when he says free speech.
All self proclaimed free speech advocates are free speech NIMBYs.