Check out these textbook disclaimer stickers from Colin Purrington of Swarthmore College. My personal favorites:
This textbook contain material on gravity. Gravity is a theory, not a fact, regarding a force that cannot be directly seen. This material should be approached with an open mind studied carefully, and critically considered.

This book was anonymously donated to your school library to discreetly promote religious alternatives to the theory of evolution. When you are finished with it, please refile it in the fiction section.
He's also got a link to a nice pdf "15 Answers to Creationist Nonsense."