A hoax is a deliberately created illusion and spiritually suggests that we may be fooling ourselves. An action that we consider to be spiritual may actually be self-centred or negative. In dreams to become conscious of a hoax suggests that we do not trust our ability to sort out the real from the unreal. If we often find ourselves the butt of practical jokes in waking life our dreams may enable us to deal with this with humour. In practical terms a hoax is a deliberately engineered set of circumstances, which has no basis in truth. We may dream of such a thing when we are dissatisfied with circumstances in our lives. We may need to make radical changes in order to be true to ourselves. You might also like to consult the entry for Joke/Joker.