I'm going back to teaching this year after being an administrator for 13 years and stories like this just make me mad. I'm committed to join others that make their material available for free (under a creative commons license) and encourage colleagues from other institutions to do the same. The good news is that I soon will have completed a textbook for introductory linear algebra. The not-so-good news (for most of the HN crowd) is that all I write is in French. Fortunately, there are already free textbooks in linear algebra available in English. If enough of us make a stand, within 5 years there might be enough material written to shame anyone showing this kind of disgusting behaviour.