Why scammers claim to be from Nigeria...

Scam emails usually have two things in common: they're comically bad, and they're from a Nigerian prince.
You might think that's a silly strategy, but it turns out it's not.
Microsoft released a new white paper from its research division this month that explains why scammers use such a "terrible" approach.
It turns out it's a method for sifting out "false positives," — basically finding only the most gullible people so the scammer doesn't waste any time exchanging with a mark that isn't going to result in a payout.
You can read the full paper on its research site — which uses complex mathematical modeling techniques to sift out the false positive rate. But here's the most important part from the abstract:
Far-fetched tales of West African riches strike most as comical. Our analysis suggests that is an advantage to the attacker, not a disadvantage. Since his attack has a low density of victims the Nigerian scammer has an over-riding need to reduce false positives. By sending an email that repels all but the most gullible the scammer gets the most promising marks to self-select, and tilts the true to false positive ratio in his favor.


Read more: http://www.businessinsider.com/microsofts-research-scientists-finally-solved-why-scammers-say-theyre-from-nigeria-2012-6#ixzz1yLHSdNxT