Several people have written about this, a ridiculous case where a publisher is suing the students of a professor for circulating class notes, arguing that this would irreparably damage sales of the materials it publishes by the professor. Stahmer asks, "I wonder how many original ideas are in the professor's lectures and how many he's adapted from others. Doesn't he owe them some of the royalties?" And David Wiley writes, "Moulton created a variety of (we assume high quality) teaching materials, and then Faulkner somehow snookers him into signing over all the copyrights in his work to them. So that Faulkner can sue people and say 'we nobly defend the rights of professors.' Nope - thanks to you, the professor has no more copyrights in his work. Shame, shame, shame." Wiley has more here.