https://en.wikipedia.org/wiki/List_of_warez_groups
https://en.wikipedia.org/wiki/Standard_(warez)
https://scenerules.org/
http://scenegrouplist.com/index.php
https://opentrackers.org/where-pirated-content-comes-from/
https://labnol.blogspot.ba/2006/06/mpaa-explains-pyramid-of-internet.html