Yep, the half-arsed/lazy aspect of it is only one implication. There's also a whole range of academic copyright issues. What if the content from the notes starts getting used in assignments? You're not supposed to write anything really without being able to reference/source it...that includes information from lecture material.
And it will. Sadly it boils down to not the implication of it all but the dollar aspect. X for submitting and X for accessing.