Facebook's efforts to moderate content that appears on the social network have run into numerous problems, most recently with a famous war photo and a bunch of blog posts. Some have made absurd demands in response, such as giving old-school media editors special posting privileges, while others have objected to the idea of Facebook censoring any content whatsoever. But is that objection realistic? This week, we discuss the complicated question of Facebook moderation, and what the company's role can and should be.