The popular Reddit question-and-answer section /r/IAmA, along with hundreds of others, have shut down in an apparent protest over the dismissal of a key figure at the social sharing site. Screengrab from Reddit.com hide caption

itoggle caption Screengrab from Reddit.com

A Reddit mascot is shown at the company's headquarters in San Francisco. Reddit has published a new policy aimed at harassment on the site. Robert Galbraith/Reuters/Landov hide caption

itoggle caption Robert Galbraith/Reuters/Landov

Brown University student Sunil Tripathi, who has been missing since March, was wrongly identified in social media as a suspect in the Boston Marathon bombings. Reddit has apologized to Tripathi's family "for the pain they have had to endure." Brown University/AP hide caption

itoggle caption Brown University/AP

Aaron Swartz co-authored RSS and founded the company that later became the social media website Reddit. Boston Globe via Getty Images hide caption

itoggle caption Boston Globe via Getty Images

Morgan Jones, an 18-year-old from Denver, gave minute-by-minute updates Friday on the movie theater shootings in nearby Aurora, Colo. Courtesy of Morgan Jones hide caption

itoggle caption Courtesy of Morgan Jones