Pretty sure botkillers are client side things. There is an entity, but you can't do much with them. Deleting them or calling removewearable on the fob does nothing... Setting alpha or render mode does nothing... There might be another call to remove them, but i've no idea what it is. If you try to return plugins stop when they are created, the server hangs.
I've just been returning plugin handled in ogni for all botkillers.. And making new weapons on a timer if they are still on red. Totally not ideal but works. But also bans botkillers.
So can anyone release a plugin here that just blocks all botkillers and replaces them with the default weapon for that item/weapon slot.