The SOPA bill by the U.S. House of Representatives, and the PIPA draft of the U.S. Senate, both targeting foreign sites that violate copyrights. The bill is generally associated with media piracy, but also can be applied to the medicine and consumer goods.
Initially, the law draft provides two methods to fight copyright infringement on foreign sites. In one method, the U.S. Justice Department may file a court order to make internet service providers to block sites that violate. For example, Comcast can prevent customers to access the infringing site, although essentially an IP address can still be achieved. Terms of ISPs blocking is a major concern of internet security experts.