I don't think benzine would forget about the medium. You can't speak openly in the dead thread while they're alive and it's really annoying as a GM. If nothing else, you have to be mindful that they're alive and you need to watch what you say, so you can't entirely forget it. I also don't think a medium would say nothing if their access was forgotten. Why not just remind him? One or the other happening, sure, maybe, but both? With four people dead the first day, at least some of whom tend to be active in dead threads?? Nah, I doubt it.