The recent events at Virginia Tech were unbelievably sad and tragic. There were, clearly, many contributing factors behind Cho Seung-hui's horrific actions. Yes, some of his poses in the home video he sent NBC news seem to echo scenes in Park Chanwook's Oldboy. But is Oldboy responsible for this man's crime? I would argue, no, it's not. Let's not blame the movies. Nor restart the case for censorship of violent movies that arose in the days after Jamie Bulger's murder.
A wise man once said that most killers claim that God told them to do it, but no one ever advocates the Bible be banned. So let's not go that way with movies.