Besides the bullies in Instagram comments, there were others posting graphic photos of their suicide attempts, or passing around images of child nudity or animal abuse, or posting #thinspiration content—the kind that glamorized anorexia and bulimia. Systrom and Krieger didn’t want any of this to be on Instagram and knew, as the site got bigger, that they wouldn’t be able to comb through everything to delete the worst stuff manually. After just nine months, the app already hosted 150 million photos, with users posting 15 photos per second.
