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