And it is an abuse of power and a threat to free speech.
I disagree. No one is trying to ban him, and his threads in the wrong boards haven't even been deleted. He's being allowed to spew his nonsense anywhere he goes. Negative trust does not stop him posting in any way shape or form.
Similarly, there are no free speech restrictions on trust, which is why most DT members have a plethora of ratings calling them pedophiles, racists, motherfuckers, faggots, whores, etc.