If all the world's a stage- or a computer simulation as some contemporary thinkers say- then our morality is as illusory as everything else about us. There are no good actions or evil actions- just things going on, events in sequence, stories- and no Good and Evil in the abstract either. Is it wicked of the actor playing Macbeth to enact the murder of the actor playing Duncan? Of course not. The actor playing Duncan is still alive, sitting in his changing room, washing off the ketchup. When the actor playing Macbeth comes off stage he congratulates him on how well the play is going.