Controversial books and schools - can there be a solution?

I went away for the weekend and read blogs, something I seldom have time to do. I read blogs about book banning and censorship and then read the comments. My friends can tell you how heated it got. I sent some links to my husband and proceeded to talk for hours with him about his opinions. He tends to lean towards conservative and I tend to lean towards liberal, although we both sit squarely in the middle.

I've thought of a solution that might work and wonder if it's been considered in the school districts. (Let me say up front, I homeschool and am an assistant librarian in a public library. Just want to throw that out there so there's no confusion.)

What about a signed permission slip for middle school and/or high school? A list of books could be placed on it, sent home to the parents and filed with the library. Some middle schoolers have the kind of situations that take place in Ellen Hopkins' and Laurie Halse Anderson's books happening in their own life. Others don't, and it may be too much for the younger kids. Plus the really (I can't think of an appropriate, non-judgemental word here but am going to take a stab at it) conscientious parents can opt out if they don't want their child reading it.

If you know of sites where compromises have been suggested, please link in the comments. Also, let me know your opinion. I'm really curious. Do you think a solution can be reached?