There were sniffy comments the last time I mentioned this, but heigh ho: at my final school, the end of the school year was brightened by the competition for the COTY cup (Complaint Of The Year), with the details of the finalists being given to the staffroom. Sometimes grim humour gets you through; "Oh you have an unfair advantage! You've got (the "That Parent-in-Chief") in your form!"
Just a couple; selective school, streamed for Maths, one bright lazy lad who had come to rely on innate intelligence came unstuck as the pace picked up, and got demoted from "A" set to "B" set, on the clear understanding that all he had to do to move back up was to apply himself a bit more (true). The Maths checkup test was, apparently, racist. I do appreciate that some subjects such as English and History can be slanted, but Maths?
One from another school. Parents Evening arranged, in the days when a letter went home with a slip to be filled in for appointment preferences. Time passed, preferred times all bagged, then on the day before the actual Parents' Evening, a long screed from an indignant mother who had only just got wind of it. She took a deep interest in her daughter's education, the lack of notice gave her no chance to attend, the school really ought to communicate better, etc, written on the back of the first convenient sheet of paper to come to hand, you've guessed it, it was the back of the(dated) letter her daughter had obediently taken home, giving notice of the upcoming Parents' Evening, also in the school calendar at the front of all homework diaries.......I believe that one got framed and displayed in the Staffroom.
I have been berated because a boy was upset about not being able to obtain the regulation swimming costume (independent school). The PE staff were aware of the problem, suppliers had let them down, told the boys not to worry, it wasn't their fault, just wear your own cossie, it's the swimming which matters and if you're picked for a team, we'll find something in Lost Property. But "He gets upset". I did not work for this large retailing chain, indeed I wasn't even his form teacher, but saw him twice a week for Music.
And then, at the end of term, you get the lovely messages from the parents who really appreciate what you are trying to do, and have the wit to realise that sometimes, just sometimes, what mummy gets is the edited highlights......