They don't have to, because he effectively can't be muted. People tweet quote him with an image, and it's not blocked even though I have him blocked as an account. This behavior is pervasive enough that you can still see his tweets all the time.
I imagine it's the largest metric in a mission control style room
it starts dropping, klaxons start blaring, the room drops to red only lighting, engineers on the floor start pulling out their hair knowing the shitstorm that's coming