Personally I think demanding parents are usually pains in the asses. They aren't demanding their kids get a good education etc. They are usually demanding, in a round about way, that their children are treated differently.
In regards to the school expecting parents to do things.
I also think it's gone too far. Last year we had aspire mornings where one morning of the week, parents went into the school to work with their children. Ours was Friday every week. I went to quite a few but could go to them all.
Parents who didn't, were judged the head made it clear. The head also openly judged parents who didn't attend a school concert with 24 hours notice.
The last half term of the school years has something going off so often, that I can find myself in school 1-3 mornings a week.
Then bake sales where I spend £2 on buns, so ds can go in and buy a different bun for 50p.
I would rather buy ds a bun and give the £1.50 to the school.
Just before the last half term, we had a parents assembly and harvest assembly in the same week, A school disco, a non uniform day and the friends of the school meeting.
Add on parent consultations and stuff you have to attend and it's a nightmare.
I work from home and help out as much as I can. I can move my work round to a certain degree.
Tbh it never really appreciated, but it made clear you are judged for not attending everything.
Luckily for us that head teacher has left and the new head has more understanding that people work. That people want to be involved, bits it's not always possible, every time.
I think some parents need to appreciate schools and staff more and school need to appreciate how difficult it is for parents too.