DHS absorbed the Customs department, which has power to deal with issues surrounding counterfeit goods. The domains DHS has been taking down have redistributed

DHS absorbed the Customs department, which has power to deal with issues surrounding counterfeit goods. The domains DHS has been taking down have redistributed digital content without license/permission, which DHS considers to be a form of counterfeiting. (Not saying they're right, just explaining why they're involved.)