Lenny Pozner says he spends hours every day trying to erase online conspiracy theories that the death of his 6-year-old son Noah at the Sandy Hook Elementary School was a hoax.
He has taken Alex Jones of Infowars, by far the most visible Sandy Hook denier, to court. He has put pressure on major tech companies to take action against the conspiracy theorists who flourish on their platforms.
But the bulk of his work is more methodical. Sandy Hook conspiracies are strewn around the internet on various platforms, each with its own opaque rules and reporting mechanisms. So Mr. Pozner has studiously flagged countless videos and posts for a wide variety of offenses — invasions of privacy, threats and harassment, and copyright infringement — prompting Facebook, Amazon, and Google to remove false material about his son.