People have been defecting successfully, in droves I might add, for centuries without the use of Tor.

While contract killing and child-kidnapping aren’t a new concept, they are certainly fringe

But contract killer MARKETPLACES, like eBay-for-murder, and child-kidnapping marketplaces would be (are? Silk Road) a new thing and anonymity would help make them work much better than they ever did in the past.

Your ratios: “for every Syrian woman there also a child-trafficker”. Seems like we might have a LOT more evidence than this of the actual ratio. People erroneously thought Bitcoin was untraceable and the first and overwhelmingly largest business built on it in the early days was Silk Road where OxyContin was trafficked without a prescription, and the founder himself allegedly contracted out some murder.

Would you be surprised if Tor use was 100 kiddie-porn users to every 1 Syrian mommy trying to get kids out of Syria (using a browser??)

Would that be acceptable odds?