http://johnolson.blog.com/2010/06/22/busted-for-illegal-book-sales-my-own-books/

Yesterday I was busted at Fort Funston by the National Park
Rangers and given a ticket for illegal book sales. I had not sold even one of my
books—they ain’t exactly hotcakes. Of course, they came up with a fancy name for
what I done wrong—soliciting a business without authorization.