KeithA: "The East European cases do not involve school kids."

I don't know anything too much about East European human trafficking gangs in particular, but one statistic I have read was an estimate by UNICEF that 2 Million children were trafficked for sex globally in 2007. It's both an internal trade in numerous countries (including both developing and developed nations) as well as an international one. I haven't found the statistics concerning exactly who's responsible for this huge global trade in child sex trafficking, but it stands to reason that Pakistani gangs can't be in control of all of it.