https://arstechnica.com/tech-policy/2020/07/web-host-not-responsible-for-porn-pirate-site-court-rules/

A federal appeals court has upheld a ruling that site hosts are not liable for copyright infringement committed by the sites they host, so long as they take the "simple measures" of forwarding claims to the site owner.

The ruling follows a legal battle between adult content company ALS Scan and site hosting service Steadfast. The Ninth Circuit Court of Appeals ruled 2 to 1 on Friday (PDF) that even though ALS has a "whack-a-mole problem" with pirated content popping up on Imagebam, a site Steadfast hosts, the host did its part to prevent the piracy.