N&R covers library filtering story. One issue raised: "[A] large part of objectionable material derives from popular social networking sites such as YouTube or Facebook, or even attachments to e-mail, which would not be practical for the library to block."
I'm going to close comments at this post to keep the conversation concentrated here, where the current question is: "What are our community standards? What should we allow, and on which computers? Who decides?" To which I would add, should we block Facebook?