Well, serves the fuckers right for being at a fucking psychic show in the first place. What empirical evidence is there for humans being able to perform those kinds of telepathic feats? And even if they were, why would whatever spiritual medium that offers them this information, provide such banalities as "dave, the dude with a back problem"?
Anyway, society is full of leaches trying to scam people out of their time and money. I think of it as product testing. Except the product in this case is your brain.