angry tapir writes "'Nigerian scams' (also known as '419 scams' but more accurately called 'advance fee fraud') continue to clog up inboxes with tales of fantastic wealth for the recipient. The raises the question: Do people still fall for this rubbish? The emails often outline ridiculous scenarios but promise millions if a person offers to help get money out of a country. The reason for the ridiculous scenarios seems obvious in retrospect: According to research by Cormac Herley at Microsoft, scammers are looking for the most gullible people, and their crazy emails can help weed out people who are savvy enough to know better. Contrary to what people believe, the scams aren't 'free' for the scammers (PDF): sending an email might have close to zero cost attached, but the process of getting money out of someone can be quite complicated and incurs costs (for example, recruiting other parties to participate in the scam). So at the end of the day, the scammer wants to find people who will almost certainly fall for the scam and offer a good return."