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 th

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. This was discussed previously on The Daily WTF: "If you're a spammer, you don't want to waste your time corresponding with someone with even half a clue." [1] [1] http://thedailywtf.com/Comments/Best-of-Email-Automated-Insecurity,-Outdated-Vacancy,-and-a-Burnt-Tongue.aspx#401640 http://thedailywtf.com/Comments/Best-of-Email-Automated-Inse...}