Let's compare that to "when the looting starts the shooting begins".
Which is an observation, and which is a directive? I think that is the key question that Twitter is dodging. They want to editorialize with their opinion as to which is which, but not for everyone.
Hacker News frequently threatens censorship, prevents users from responding for several hours, etc. Do you think they should have that right since it is their platform?
That's what the tweet says, there are screenshots in the replies.