I am not a participant in your series but from an outside perspective, I don't think anyone much would blame you if you put a permanent ban on these drama llamas that carry on grudges from thread to thread. On the flip side, you might have less aggro if you properly punished people that drive atrociously in your races. Rather than imposing penalties and then scaling them down when they go crying in a protest thread.
From what i've seen, you (RN) put yourself out to make races good and then get an unnecessary amount of aggro from childish idiots. Don't put up with it, ban them from your servers whatever end of the field they are driving at.