In another recent news story, a Michigan doctor who specialized in cancer treatment was found to either be over treating patients or treating them for no reason. The doctor has now been arrested and charged with numerous crimes. However, that doesn't fix the fact that he convinced innocents that they were sick and needed treatment in order to fatten his own wallet. While one person received radiation for no reason, the doctor bought a bigger house.
The message you receive from these stories is that greed is everywhere. As individuals, we are programmed to have an instinct. We use that when we meet people for the first time and gauge our feelings about the interaction. Don't ignore your instinct. If you are unsure of what someone has told you, get a second opinion from someone in a different location.