I remember a Star Trek episode where they captured a Borg (I, Borg) where they were going to program him with the ability to think for himself and be independent. They were then going to send him back so he could infect the rest.
So yes, I think people who can think for themselves and know a lot about JW history and falsehoods, who are still accepted as JWs in good standing, are very dangerous to the JW mindset. Which is why the Society has been issuing instruction about not even trusting the brothers in your congregation. TRUST NO ONE except the WBTS.
Perhaps the biggest threat to their control is the Internet.