i've just been on a thread i posted (about the maharishi effect) on a certain conspiracy forum and the cynical bunch are saying that such practices are ways for demons to possess us and maharishi was a member of secret societies.
if demons do exist, i feel that they are probably just lost souls, or energetic projections of our subconscious. and the spirit can take any "shape"...... imo, any demons/ hell that do/ does exist.....could well be a form of illusion- the sum total of negative energy of the collective consciousness. they aren't the true source of "evil".