Doesn't seem like too hard of an accomplishment (compared to traditional spam detection), I mean, all of the spammers in this case are registered and accounted

Doesn't seem like too hard of an accomplishment (compared to traditional spam detection), I mean, all of the spammers in this case are registered and accounted for by Facebook. Granted, the end effect is actually quite nice. I block every application that pops up. I even think I turned them off blanket fashion. Kudos to FB for allowing this.