They were certainly doing it 20 years ago. I can think of a professor who was caught in my department doing exactly this. In this case, as back then, I doubt an

They were certainly doing it 20 years ago. I can think of a professor who was caught in my department doing exactly this. In this case, as back then, I doubt any sanctions will be taken as although the professor is cheating the system: his employer benefits from the deception.