While most Internet-savvy people are at least casually familiar with 4chan — the online forum where a lot of the Web’s most popular content gets its start — the site has been pushed into the spotlight in recent days because of users who posted stolen nude and personal photos of several female celebrities. After years of relying on its self-erasing format that automatically removes old content, 4chan has now instituted a formal policy for people to request removal of copyrighted content. [More]