4chan, that most elusive of Internet beasts, has seen a whole lot of press lately — little of it good. First the site was blamed for leaking the stolen nude photographs of dozens of female celebrities. Later it invented an unfunny and inexplicable “mascot” for Ebola, and encouraged witless new iPhone owners to microwave their phones. (That latter rumor gained so much traction, the Los Angeles Police Department felt compelled to weigh in.)