Automatic writing, is a genuine method for getting stuff out of your head from the subconscious mind. It's not a supernatural phenomenon - it's the same sort of ideomotor effect that makes ouija-boards "work" - i.e. the participants are actually generating the words, but are not aware that they are physically pushing the glass around themselves to do so.
I read The Unexplained as a kid, so in my mind automatic writing will always be associated with mediums, spiritualists, crackpots and frauds.
Even if we accept it as a valid method of psychoanalysis, any suggestion that the collective subconscious of a group of people can somehow predict the future is bullshit.