No jousting at Green Apple Books

A sign in the window of Green Apple Books in San Francisco, CA announces that "Lances, Shields, Helmets, Not Sold" there. Instead, the note offers books on the subject. (photo)

The blog, SFist, which posted the note wonders if the GA staff "had enough inquiries on the subject to warrant such a note. Or is it merely a clever way to sell more material on jousting?"