The mind in control?

Look at the link and see if you think that this is frightening? People can understand how the mind works to an extent where they can connect a living thing to a nonliving thing and function as if it were a part of the living thing. This frightened me a bit at first. How do we know that certain people's understanding of how the mind controls the rest of the body are not already manipulating other things without the rest of the world knowing. This is to say that a few curious people fiddle around and results in a new discovery over complete authority over others, nonliving and living. Free will would be only a luxury that the authority possesses.