(Replying to PARENT post)
Your "forget to lock up your business overnight" scenario isn't a useful analogy since entering that business would be at least trespass and possibly breaking and entering (no physical breaking needs to occur), so anything after that obviously is a result of exceeding access.
Riffing off of my older analogy, if I entered a library and asked the librarian "Can you please print flyer.pdf?" and the librarian did so, is that "obviously not fair game"?
To be clear, I'm considering only the act of printing rather than the contents of the flyer; it could be a single pixel or the word "LOVE". I suspect that this is ultimately some sort of mischief since it's unlikely he had any plans to travel to each location to pick up the output, but I'm having a hard time seeing how this is hacking.
(Replying to PARENT post)
I think a print server at a university is pretty obviously not fair game. If you forget to lock up your business overnight and someone walks in and prints off a couple thousand pages using your printer it's definitely illegal.