Child pornography
Unfortunately, the cloak of anonymity brought by the Tor network also brings in rather heavy share of pedophiles and predators—over 80 percent, one study found.
Some darknet platforms allow users to disseminate pornographic images and videos of children, and some platforms even provide the means for users to arrange meetings with their victims.
International law enforcement have busted several such platforms within the last few years, arresting thousands of child abusers and human traffickers in the process. The number of users behind these sites are staggering.
One that was busted by German law enforcement earlier this year, was Elysium, which managed to reel in more than 87,000 users worldwide.
In 2014, the FBI cracked down on Playpen, another child pornography site with 150,000 users.
The FBI apprehended its creator and lead administrator, and proceeded to operate the site to gather information on its users.