That's what I also don't understand... How could people fell for the Nigerian scam systems today? It has already proven/documented/written/etc... that these kind of stories are always scam...
But people just don't learn from the other people's mistakes, they only learn about losing their own money... and after they blame everyone but themselves...
So unless people learn how to handle their greed with rationalism and learning about things they want to spend their money for, these scams will be here to stay...