'It was all faked in the desert, near Area-51'

Glenn Reynolds is often way off base, but on this issue he is dead on. As a teacher, I worry when we have to provide a warning label before every little controversial issue is discussed. Believe it or not, a good teacher DOES talk about issues, not just dry facts, and they don't need a warning label to do so. Critical thinking and all that, after all.
Thanks to Kevin Drum for the link.