Many people have made a sport of winding up these scammers. There are numerous sites where the results of the wind-ups are published. loosehead mentions just one of them.
The scam is known as 419 fraud after the section of the Nigerian penal code that deals with advance fee fraud.
Those that make a sport of getting their own back on the scammers are known as scambaiters.
The best known site for scambaiters is
http://www.419eater.com/ which has over 20,000 members. If you follow the link you will be able to see some outstanding examples of scambaiters at work successfully making fools of the scammers.
The site has a Hall of Shame and a Trophy Room which make hilarious viewing. There are also links to many other sites that deal with published scam baits.
Warning. Reading the results of scambaiters work becomes addictive.