MK911, I think you've answered your own question!
And the proper response, now that you've realized the enormity (sp?) of it all, is to "get right with God," or in other words, connect with the Divine Force however you can, and work on your spirituality. Because what really matters is where YOUR head and soul are at, so when you are faced with harmful entities, you'll know what to do!
Sort of like here on earth, yes?
Is it possible for some astral projector to create somekind on monster into astral world, so if other people projects or sleeps or dies and gets into astralplane, that monster will make him some bad things in that plane.
Every thought can be real in astralplain.