The disbanded Prenda Law firm, once denounced by a judge as a “porno-trolling collective,” committed discovery abuses and could face sanctions for additional misconduct, the U.S. Court of Appeals for the D.C. Circuit ruled on Tuesday.

The appeals court struck down a lower court order directing Internet service providers to hand over information about unnamed defendants facing copyright infringement claims brought by Prenda. Judge David Tatel, writing for a three-judge D.C. Circuit panel, said Prenda made no effort to limit its requests to individuals with ties to Washington.