Homeless Investments
A homeless man appears with a very interesting skill. He becomes popular on the web, and his story drives companies to try to recruit him. He claims he has been sober for two years. Two weeks after his rise to fame, and employment by some known organizations, he admits to drinking and goes to rehab.
This makes the people who spoke for him, and were inspired about his story, look weak and naive. It definitely hurts the image of the products he promoted.