I was once shouted at by a parent because I didn't 'fight hard enough' to keep their child attending a voluntary lunchtime beginner recorder club.
Aged 6 and 7. Free club. 20 mins once a week. Only requirement to practise in between.
This child (and two others) didn't practise but said they wanted to continue so I offered an additional lunchtime catch-up session just for them for two weeks to bring them up to speed. The other two attended; this child didn't. Then said he didn't want to do recorders any more.
Fair enough.
It happened to be parents' night that week so I mentioned this and asked if they were okay with him giving up. They said he just didn't seem that interested and he might start another instrument when he was older. We agreed.
First week back after the holidays, the child turns up to recorder club. 'I thought you weren't coming anymore', I say. He stays, but has no idea of the notes etc. I again offer catch-up sessions, this time 1-1.
Next day his mum comes into the corridor as everyone is arriving and taking off coats etc and YELLS at me in front of all the children and other parents that I had no right to call myself a teacher, that her son loved music but I hadn't made any effort to support him and had tried to put him in detention for making some mistakes in the club.
I calmly (on the outside) tried to explain, including that he and they had said he didn't want to play, but she threw his recorder down on the flooor and stormed off shouting ' You just couldn't be bothered to fight to encourage him to carry on'.
Utterly bizarre, but I was shaking as I started the day and still, 30 years on, occasionally wake in the night to the shock and injustice of the attack.