I was emailed on Boxing Day by a student wanting me to read a draft of her essay that she was told to get to me by the beginning of December
Been there, worn the T-Shirt on that sort of behaviour.
University tutors can't win, it seems.
Of course we don't write home to parents, - Data Protection forbids it, but I have seen long entitled threads in the Higher Ed forum posted by parents here complaining about that, and/or claiming that because they "pay" for their children's university education you don't the taxpayer still does in one way or another then they have the right to demand the attendance of senior academic staff at Open Days, or that academics should consider parents as customers paying for a service.
So which way do you want it?
Thinking about your DD's account, ButteredParsnips I could suggest that indeed, the threat was a letter to the student's home address asking them to explain lack of attendance. I hear people moan all the time about what they're "paying for" yet students are consistently absent from scheduled lectures, seminars, and tutorials.
Of course it's a bit tough on those who are there to get a telling off - but I KNOW that if I do that, the message gets through to those who are absent. Students have very fast rumour molls - usually, they're counter-productive spreading panic & misinformation, but once in a while, we might decide to use them to pass on messages about required, responsible, adult behaviour. I've done it, starting by trying to crack a vague unfunny joke about the way I'm talking to the wrong people, but if they could pass the message on ...
And, you know, if students behave like children, sometimes you have to treat them as such (as I had to ask a lecture group repeatedly in one lecture to stop the chit chat as people around them were trying to listen). I hate having to do that, but I also have to look after the students who are there to listen & interact with me, not gossip.
And as other academic posters have said, absences disrupt everyone's learning.
They also waste my (expensive & pressured) time - like the 4 students due to have one to one tutorials with me who didn't bother to turn up - no apology, no email to tell me they weren't able to see me - nothing. Very very bad manners, and completely unprofessional. I heard on the student grapevine the lovely tutee who did attend that they'd all gone out the night before and had a very late -morning night. It's just rubbish behaviour.
But I'm expected to put up with it, and read their essay drafts on my family's time over Easter.
So - some thoughts from the coalface about why your DD was subjected to a rant.