censoring penguins?

A true story being banned? How does that work? In And Tango Makes Three a male-male penguin couple hatch an egg and raise a baby. It's real life. What exactly do parents and "concerned" groups think they will accomplish through challenging a true story? I'm not sure, but here's the info. Please feel free to share your thoughts and comments. I would really like to hear what anyone has to say on this subject.

Authors: Justin Richardson and Peter Parnell
Title: And Tango Makes Three
Publisher: Simon & Schuster

And Tango Makes Three was placed on restricted access in all elementary school libraries throughout Loudoun County in February 2008. The book was challenged by one parent who objected to the story of two male penguins who parent a chick as an attack on families headed by heterosexuals. The book was reviewed by two committees of librarians, teachers, principals, parents, and administrators at the school and district levels. Both committees recommended against any restrictions on the book. Despite these recommendations, the Superintendent decided to restrict student access to the book, which was made available only to teachers or parents. ABFFE and NCAC sent a letter to the Superintendent urging him to reverse his decision, and our comments on the issue were printed in the Loudoun Times-Mirror. We also provided resources on book challenge policies and the First Amendment in schools to members of the school board. The Superintendent later returned the book to circulation based on “procedural errors” in the review process.

Two parents challenged And Tango Makes Three for use in elementary school libraries in Ankeny, Iowa. The parents objected to the story of two male penguins who parent a chick because they say the book is not “age-appropriate.” ABFFE and NCAC sent a letter to the Ankeny School Board opposing the challenges in November 2008. We also provided information on the First Amendment in schools to school officials. The board voted 6-1 in December 2008 to keep the book on library shelves.

Source: The Kids' Right to Read Project