Intuitive gut reaction. If I had an argument to make I would have said so. Any case I make would have been formed from backtracking from my initial feeling, and I'm probably not the only commenter here arguing based on an "ick" or "yay" gut reaction to the idea of censorship. I thought it was worth pointing out.
Status quo bias: I'm reasonably sure that if this policy had been in place from Day 1, very few people would have given it a second thought.
http://wiki.lesswrong.com/wiki/Deletion_policy
This is my attempt to codify the informal rules I've been working by.
I'll leave this post up for a bit, but strongly suspect that it will have to be deleted not too long thereafter. I haven't been particularly encouraged to try responding to comments, either. Nonetheless, if there's something I missed, let me know.