The Internet's most successful scams

Saw an episode of Intervention on A & E.
The Guy broke his back and became addicted to painkillers. Before the Intervention they asked him how much money was owed to him in Lottery winnings, he stated 50+ million dollars. On the show they recorded the phone conversations he was having with the scammers. This guy was about to lose his house and was still willing to send money to the scammers.
It was truly sad.

Watched an episode of Dateline about Internet Identity trade. Many of the people were just blindly trusting thinking they found love online. They were really just mule drop points for packages purchased in an international credit theft ring. Many of the people were second sold lottery scams or asked to send money to help them get through the red tape process so they could get married since they were so trusting.
While being a mule one guy was conned out of $40,000US sent to his "Fiance" which was a Nigerian Man living in Switzerland.
It was shocking to see the depth of gullibility.

Am I my brothers keeper?