A class action alleges that Facebook Inc. fails to provide a safe workplace for content moderators who suffer from psychological trauma relating to their jobs of weeding out graphic content depicting child abuse, suicide and other violent events.

Filed in California’s San Mateo Superior Court this past Friday, the lawsuit seeks to represent thousands of California residents who worked as content moderators for Facebook over the past three years and allegedly suffered from trauma after viewing thousands of videos and images of “child abuse, rape, torture, bestiality, beheadings, suicide, murder and other forms of extreme violence.”