The U.S. Court of Appeals for the Ninth Circuit revisited a case Wednesday with implications for the legal immunity Internet companies like Facebook, Craiglist and Twitter can claim under Section 230 of the Communications Decency Act.

The same three-judge panel unanimously ruled last year that Internet Brands Inc., the operator of a website for aspiring models, could be sued for failing to warn users of known predators targeting the site. They agreed to reconsider the ruling after a group of web companies argued the decision would unleash a storm of lawsuits and threaten their businesses.