There should be a new class - or race - added to fantasy worlds. The Marketers. More evil than demons, undeader than the Lich King. Their gameplay mechanics would be based around earning gold by draining their own souls, as well as the souls of characters around them. Their primary combat role would be casting annoying debuff spells at everyone around, friend and foe alike.
Seriously though, this article basically says that someone out there has reached another level in insidiousness. If it was an MMO, we could at least form a raiding party and get rid of the problem once and for all.