This is the first time I've heard about class notes being copyright violations. But I had heard about a professor not wanting to be recorded, or not allowing laptop notetaking, because it was too good a copy of their speech. And once on these boards, someone did ask for a website of links to recordings or videos for their class, as if it were even possible for us to have it.
Obviously, this question is a gray area, notes are of course allowed, as fair use, but a company paying people to stenograph the teacher's words, for resale, while the teacher attempts to market their own lectures, sold by a company outside the university while meantime, presumably, under a paying contract with the university for lesson production, muddles the question to the point where the whole argument dissolves into polarized opinions.
But the whole concept does hinge back on the sometimes "gimmie gimmie" attitude people can have when it comes to knowledge.