In the United States, we have come to expect that intermediaries such as online service providers will be shielded from liability for the content that third parties post on or through them. However, in other countries, the need to control the message has led to greater pressure to place the burden on the messenger. In the UK, attempts to crack down against “violent pornography” are raising the question of how much liability the gatekeepers of the Internet should face. Whose responsibility is it to filter the Internet? What are the ramifications of placing that burden on ISPs and search engines? Can an “opt-in Internet” work?