Some professors are claiming copyright to their lectures, in hope of stopping the trend toward online note-swapping. Their main objection, of course, is that some students see this as a substitute for attending class.
The money quote:
"Missing a class and relying on notes eliminates the context of the discussion," Lindsay said. "It's easy to spot the students who do this, and it shows in their performance."
Then, what's the problem? It's not like we can eliminate every way of being a poor student.