Just goes to show that almost anything good can be twisted. I was going to say perverted, but we're talking about child pornography, and that is really beyond perversion. The hosting service, ironically called Freedom Hosting, hosted 40+ web sites dedicated to illegal porn, one such site called Lolita City reportedly had 100 gig of such stuff.
The dark net stuff is the interesting part. I've often wondered how such a thing would be created, and it has been done: they use TOR, The Onion Router, an anonymizing software package from the Electronic Freedom Foundation that was intended for people in highly-restrictive countries like China and Iran to be able to access the internet and get information out without the government being able to trace it back to them.
Anonymous learned of Freedom Hosting providing services for this site, sent them a demand telling them to remove this content, and when Freedom didn't, Anonymous took them offline.
http://www.securitynewsdaily.com/anonymous-hackers-child-porn-sites-1260/http://yro.slashdot.org/story/11/10/22/1325238/anonymous-hackers-take-down-child-porn-websites
