ATAT, I'm glad you held the line while also not being totally rigid.

For one of the classes I TA'ed in grad school -- one of three TAs for a class of 54 students in which every single class was a student presentation of some sort or a guest lecture or group-work -- the prof insisted that students had severe (likely undiagnosed) mental health issues and so, we TAs needed to be available for more than the usual TA office hours to do well, more than TA-ing and lend an ear.

However, when a student actually wrote to say that she'd been diagnosed with major depression and so did her advisor, while the prof agreed to accommodate her by letting her take a little extra time for it, she was a solid hard arse about it. That kid was really struggling, it was obvious -- in a class where group-work and collaboration and participation was heavily prized, she'd kinda just hang out vacantly, if she even managed to show up.

When it came to grading time, I really wanted to cut the kid some slack and bump her up from where she'd be (a B-ish place) but prof totally refused and had no sympathy (too bad she's got depression; gotta suck it up kinda thing).

On the other hand, another dude -- totally obnoxious and would pick on anyone who was slightly different -- came in and just told the prof that he needed a minimum of an A- (no reasons given) and boom, he got it (although in reality, he was far from it). Prof decided that he probably had some major scholarship riding on it etc.

The only lesson I learnt -- less information worked better with her.