"The goal of the state is to find some practice that is universally reviled and pose as the one and only way of expunging it from society. The best example today is child pornography, a grim and ghastly industry that every decent person would like to see eradicated from the earth. But in the name of doing so, the state invades everyone's privacy, controls speech, interferes with families, and otherwise uses the issue as a wedge to eliminate every freedom."