Sinister Muircastle

I know the idea is to file abuse reports - but do they even work? We run a roleplay sim, and recently a disagreement lead to one of the leaders leaving and starting his own and since then he has decided to IM anyone and everyone he can from our sim and harass them until they leave. one of the sim owners is leaving sl for a while to even take a mental health break because it's gotten so bad. we haven't been dragging him or his sim to anyone. we answer questions honestly when their asked. But he's going too far and it's affecting peoples enjoyment of second life. we want them to stop, but abuse reports I've heard, don't go anywhere.