DD, I didn't say the studies would result in a "witch-hunt" but I could see someone claiming their abilities to "read people" could be used as justification for a witch-hunt.
Just imagine some elder reading the same article you did, taking the $20 online course on "lie detection" and then going full-tilt-boogie on some poor JW because they blinked or twitched or looked down when they were being interrogated by a Judicial Committee of window-washers and janitors. The elders already think they have "holy spirit" guiding their inquisitorial procedures.
Now you get the picture.