Though I dislike DeVault myself, this is a well-researched blog post that clearly demonstrates that Stallman has an oddly-specific interest in defending adults having sex with adolescents. I was very weakly hoping for Stallman's insistence on distinguishing between children and adolescents to come from a position of a broader youth rights, anti-adultist advocate, but this long, recurrent pattern of very specific insistence on the subject of sex makes it clear to me that, indeed, this isn't where it comes from.