I am in no position to provide any answers to you for your query and yes i do agree with you 100% that such sites need to be shut down no doubt. As to why or why not question  is not what I am talking about. To that effect i strongly agree with you on ethical grounds that this is wrong and if this site is being hosted from US borders the Feds need to take action in bringing it down. IF not then this is again the same type of issue wiki leaks or online gambling sites have posed to the US authorities that is make it hard for them to shut down sites that are being hosted abroad.