Interesting–when was this?
graduate school, in the 20th century 
We were explicitly told not to record students’ exam scores on a computer. After the course was over and final grades were issued, those went into the computer, of course, but not things like individual quiz grades (unless someone bothered to digitize them later).
Exams were on paper, too, and we collected all the scratch paper, just in case it needed to be scrutinized.
P.S. At least one scientist faking data was caught altering computer files: Victor Ninov - Wikipedia
Heh. I think that advice might not be given anymore.