DC sent home with packet of powder paint

[Peleus]

This is probably the wrong subject to post in, but I don't know how to post in Primary Schools.
All children in DC's Reception class were sent home from school with a sealed packet of powder paint yesterday. Please don't ask why - I do know but don't want to give so much detail that my identify is revealed.
I had no idea that DC had the packet of powder paint because it was in school book bag and I don't look inside this until we get home. I don't have eyes in the back of my head, and have long stopped using a large mirror. Unbeknown to me, DC opened the packet of powder paint in the back of the car on the journey home and it went everywhere. Whilst I can see there may be a funny side to this, there is also a more serious Health & Safety issue. It could have gone in DC's eyes.
When I raised it with school today they said that, although they were sorry it had happened, all the children had been told at least three times not to open it.
Obviously I would preferred it if DC had done as instructed. But should a five year old really be made responsible for bringing home a product like this safely, without school mentioning it to parents at all?

Likewise- imagine the teacher is having a bad time, she does something most people agree with and the OP instead of chatting with her goes straight to complaining to the head. How would you feel? That’s a bit worse than being told a home truth anonymously on a forum, that’s potentially another tick for a bullying HT. At the very least it’s horrible at work to have your boss chastise you publicly by changing a rule when you are honestly trying to do something positive.

Had the OP been a bit more decent, just chatted with the teacher and said ‘look this happened, could you think about this in the future?’ I’d certainly have sympathy.

To be blunt by ‘less engaged’ I mean you are engaging with your child less than average at home time if you don’t check the book bag or chat to them a bit about what’s in the back. I have a special needs child and 4 others and I would with them all, I look around and it’s the norm for the most harried parents.

This isn’t about rounding up on someone, it’s about truthful answers to a question you asked. If she goes through school going to the head for many minor things she will make teachers lives miserable, and probably have a lot of niggles like this. I wouldn’t personally cry off about these answers, I’d self reflect a bit and adjust my own expectations and actions.

There’s a balance with the view that Mumsnet is weird/ bullying etc and the ability to recognise that maybe there’s another point of view. Why even post if you’re not receptive to other POV?