What are some of the scariest psychological hacks?

The scariest is when people overestimate their wisdom by using psychology. It's scary because psychologists themselves are actually trained to be the worst form of listeners, because they avoid putting anything into any kind of broader context. You cannot understand something unless you also know its context.

Also the logic psychologists employ, when they employ any, is egregiously wrong. They are akin to puppy abusers. I will shave off your skin and then pronounce you “sensitive”. I will beat you a lot, and then pronounce you “avoidant”. All for the shhits and giggles, 😂 😆

And I certainly would not want a psychologist in my home. A hothouse plant with a fragile temperament.