Can Viewing Photos Be Hazardous to Your Health?

Facebook's content moderators have to look at some awful images and video to protect the rest of us from graphic content. The Verge reports that many of these $15/hour contract workers have suffered PTSD or secondary PTSD symptoms, which led Sarah and Allen to ask whether viewing photos could be hazardous to your health. From war photos to images of athletes with catastrophic injuries, what images should be published by the media, and what images should the public consume?