A colleague of mine added Of Pandas and People to the Wikipedia’s list of Banned Books at http://en.wikipedia.org/wiki/Banned_books. It clearly qualifies under the American Library Association’s definition of a successfully challenged book:
A challenge is an attempt to remove or restrict materials, based upon the objections of a person or group. A banning is the removal of those materials. Challenges do not simply involve a person expressing a point of view; rather, they are an attempt to remove material from the curriculum or library, thereby restricting the access of others. The positive message of Banned Books Week: Free People Read Freely is that due to the commitment of librarians, teachers, parents, students and other concerned citizens, most challenges are unsuccessful and most materials are retained in the school curriculum or library collection.
Source: http://www.ala.org/ala/oif/bannedbooksweek/challengedbanned/challengedbanned.htm#wdcb.
If any of you want to monitor the page to see if they keep it, go for it.