I think that every advocate for censorship that I've ever heard has said some subset of the following things: 1. Freedom of speech is important, but this is a

I think that every advocate for censorship that I've ever heard has said some subset of the following things: 1. Freedom of speech is important, but this is a special case. 2. This stuff really is harmful. I don't want bad people exposing children to sex/communism/homosexuality/anorexia/witchcraft/whatever. 3. We're only going to censor $TOPIC_OF_THE_DAY. This is not a slippery slope. 4. Be reasonable. Of course in this case, the stakes aren't that high, since it's easy for censored blogs to move away from Tumblr. This policy is more about social signaling than about seriously trying to help anyone.