idiots
http://en.wikipedia.org/wiki/List_of_confidence_tricksGet-rich-quick schemes
Get-rich-quick schemes are extremely varied; these include fake franchises, real estate sure things, get-rich-quick books, wealth-building seminars, self-help gurus, sure-fire inventions, useless products, chain letters, fortune tellers, quack doctors, miracle pharmaceuticals, foreign exchange fraud, Nigerian money scams, charms and talismans. Variations include the pyramid scheme, the Ponzi scheme, and the Matrix sale.
Count Victor Lustig sold the money-printing machine which he claimed could copy $100 bills. The client, sensing huge profits, would buy the machines for a high price (usually over $30,000). Over the next twelve hours, the machine would produce just two more $100 bills, but after that it produced only blank paper, as its supply of hidden $100 bills would have become exhausted. By the time the clients realized that they had been scammed, Lustig was long gone.[citation needed] This type of scheme is also called the money box scheme.