First time accepted submitter discussM tipped us to a story about a recently granted patent in which "a system and method preventing unauthorized access to copyrighted academic texts is provided in which trademark licenses, discussion boards, and grade content are integrated into a web-based system that aligns the interests of teaching professionals, students, and publishers while also enhancing the overarching academic mission to create and disseminate knowledge." Quoting Torrent Freak: "As part of a course, students will have to participate in a web-based discussion board, an activity which counts towards their final grade. To gain access to the board students need a special code, which they get by buying the associated textbook." But don't worry too much, from Ars: "Beyond the legal questions, other experts suggested forcing students to buy texts through such a system is unlikely to be implemented. Professors have few incentives to make it more difficult and to compel students even more than they already are to buy textbooks, digital or analog. (A 2011 survey from UC Riverside found that 78 percent of undergraduates 'bought fewer books, bought cheaper books or read books on reserve to help meet expenses.')"