An anonymous reader writes: NPR's This American Life has an excellent story on the evolution of the patent troll. It looks like even the guy who coined the phrase "patent troll" took the "if you can't beat 'em join 'em route" and is now gleefully and very profitably plying victims. It is especially hard to understand why people who are already wealthy choose to engage in this sleazy money-grubbing, technology-killing extortion. I guess there is no limit on greed, ethical or otherwise.