It absolutely would be used in the opposite direction. We already have immense centralized databases that employ algorithms to create psychological profiles and predictive behavioral models for everyone who uses the internet, in an effort to control people through fear and manipulation. Technology has already made us less free than any generation before us has ever been, as we sacrifice more and more privacy and personal autonomy on the altar of convenience. Plugging our brains directly in to the internet would mean the end of human freedom.