As revealed by the ABC, scores of children have been saved from abuse after an elaborate sting by Queensland Police detectives who adopted the online persona of paedophile Shannon McCoole, the administrator of a secret online abuse network with 45,000 members.The network was hosted on the “dark net”, a part of the internet that cannot be accessed by conventional browsers. Members could only access it using encryption software that hid their online identities.
http://www.abc.net.au/news/2015-08-27/dismantled-child-porn-network-could-be-just-tip-of-the-iceberg/6729226