@dfbdfb When I was in law school, my recollection is that we were given exam numbers for a single grading period. So grades could be posted without anyone having any way to know who it was.
In reality, you could look at second year grades and if a single exam number had trouble in a number of classes you often could hazard a guess as to who it was. Sometimes people might tell someone their grade for a class, and you could narrow it down. But I don’t remember doing this, other than to note a couple of times that someone had seemed to crash and burn.