Last week, “This American Life” featured a 30-minute piece on people who scam the scammers—in this case, three guys who prey upon small-time Nigerian con men and try to trick them into placing themselves in mortal danger. “This American Life” tells how they almost got a guy to enter a Western Union office in Chad carrying an anti-Muslim/pro-Bush note that announces his intention to rob the place. Whether you think these stunts are funny probably depends on your level of empathy even for criminals, and whether you think the avengers ever fully succeed. But c’mon, getting someone in another country to hold up a sign that’s offensive in your language is pretty much always funny.