So Darwkins felt he was afforded protection by the system(s) he was critical of. If other system(s) pose a threat to his well-being, he is not critical at all. Which undermines his ability to do his job.
My thoughts on self-regulation of (social media) speech, particularly related to groups that feel empowered enough to facilitate a kind of "mob justice" in regulation. You might find this on other forums where your opinion doesn't match the mainstream, either by language, or political views. You might find yourself ostracised by Moderators, unless you align yourself with the forum group-think.
Because social media also permits more informal talk, less-considered, with grammatical errors and a more casual wording, in it's natural form there are many fault-lines to expose for those of a more analytical disposition. Easier to manipulate interpretation to something far from the authors original intent.
The mob mentality of self-regulation is illustrated in Orwell's 1984, with anyone being a possible informer to the Thought Police.