If you can't see them, doesn't that open up the possibility of students taking the exam together?
Crazy stuff.
I was able to see current and past residence data, which I suppose could have helped me verify the student's identity ("what post code[0] do you currently live at?"), but I tried not to look at that information when possible.
Lecturers also had access to this system (it dealt with some submission data), so I guess they may have had access to view residency data?
This is just an educated guess based on my experience, though.
[0]: For American readers, think ZIP code