I logged off my account, and then just for the fun of it, decided to log back in using my course unit (INF180) as the username and password.
Lo and behold, It let me in. As the course administrator. I could see student records and past assignment gradings for everyone else on my course.
Looking at the folders, it seemed that future assignments etc. were also stored within that account. I didn't go any further. I simply logged out and stayed quiet (and uneasy) about the whole thing. I was too scared to report it in case I was thrown off the course for 'hacking' the system.
A few years later (after I had well completed my studies), I was helping a friend in the same labs with an assignment. I wondered if they still had the same flaw, so I found a spare workstation and tried the same trick, but it wouldn't let me in. Glad they fixed that loophole.