(STS seems to be https://en.wikipedia.org/wiki/Superior_temporal_sulcus in the temporal lobe, so I guess it's the "I sense a presence" region.)
Explain the potential to exploit strong stimulation of specific visual regions for evil. "Oh, I very much detect a face/place/body/motion/pattern/human", says the subject. What are you going to do with that, startle them?
What exactly is your new fear here?