I'm familiar with some of these issues - my mother was a librarian for the LA City Public Library for 30 years. I worked at the local public library in high school and at the Powell Library at UCLA while in college.

This issue has been stewing for quite a while since the Children's Internet Protection Act was passed in Dec 2000. The core issue date back to age-old arguments as to what should be archived in libaries much akin to the debate in the 30's, 40's and 50's regarding such novels as Lady Chatterly's Lover and Lolita. The librarians feel that they are preserving our right to freedom from censorship along these same lines, yet they obviously cannot understand that most of the porn sites are nothing more than an exploitation of the mind.

If I had young children, I would ban them from the library if they continue to condone the viewing of porn on their networked computers. Porn is not knowledge. It's another slippery slope that we're sliding down.