I don't believe Light's suggestion would work though.
Even if BioHazard were to GM all the Predictions, everyone else and the Antagonist would still be able to read them in BioHazard's post so that point is irrelevant. If BioHazard were to secretly reveal the predictions to people individually, we wouldn't we be able to synchronize our character properly. If the prediction says, "Character A dies on he fifth floor of an apartment building" how would the Writer behind the Antagonist know to make the Antagonist go to the Apartment building? The writer behind the Antagonist could have something else planned entirely. It doesn't work unless everyone has input into the predictions so that we can play our characters accordingly.