Not only is this stuff not true, but I don't get what would "freak out" anybody about that. It would make no difference in the life of anybody who just didn't go to mediums anyway.
The biggest factor is the audience. The people who go for this kind of stuff invariably end up reporting that what the con artist had did & said was something completely different from what the con artist actually did & said.
This is why I am a regular viewer of paranormal crap on tv, that and my life is boring.
To learn how to spot the parlor tricks. Some deliver in bulk on the games but most have gone to simply letting the viewers see the evidence and decide what it was. It's the best trick of all because there is one in each home out there that is right on whatever caused something heavy to fall off camera, or why a door moved.
Madame Woo isn't much different except she wants to run your card before she does the magic. It rarely seems what it really was, same tricks as any illusionist with scantily clad assistants and lots of theatrical movements. So you fail to see how mundane the real answer was. Distract and dazzle, but try not to reveal.