This is so sad. These girls aren't even old enough to have developed their own opinions on this kind of crap, but now they are branded for life as little nazi bitches. Their parents suck sewage. And I mean that in a bad way!
Timothy M. Valdez paper, "Detection Methods Used by Copyright Holders", is a very complete document, covering detection methods, a survey of proposed and current legislation, problems with the approaches, and more. Required reading for everyone...