Psychotronic weapons : Brain Manipulation From a Distance. That it is feasible to manipulate human behavior with the use of subliminal, either sound or visual, messages is now generally known. This is why in most of the countries the use of such technologies, without consent of the user, is banned. Devices using light for the stimulation of the brain show another way how the light flashing in certain frequencies could be used for the manipulation of human psychic life.