Dear me… I've just been informed of a hilarious concept – that of Scam Baiting.
Almost anyone with an email address would know by now of the “Nigerian Scams”, where people are asked to supply their bank details to various folk in various countries, at the promise of humungous reward. Well this guy has mastered the art of wasting scammers' time. If you read the Letters Archive section, you can see some examples of sheer genius, such as getting the scammers to send him a photograph of them balancing a loaf of bread on their head (in order to prove that it's a genuine photo).
Honestly, I'm too emotional at the moment to do this description any justice. Just go there.