You don't have to send your DD to that school.
I have to send my DD to the school she's at. The other 2 within realistic travel are over subscribed, and I know this because when her school started to go spectacularly tits up I applied to both. And got turned down as there wasn't room. So some of us do have to send children to a certain school. Believe me if I could have moved her I would have.
You can campaign at governors to change the rules to ones that say whatever the rules are they are petty
Yes I agree, however my DDs school is currently of the opinion that everything that's wrong is down to parents and children. End of discussion. It's also completely passed them by that they are in a deprived area, it's a hell of a lot easier to adhere to rules that cost money when you have it.
I detest school uniforms, though not nearly so much as the views of parents who piss and moan about that they signed up for.
But I didn't have a choice, I didn't get an option. My DD has to have an education, I'm in no way qualified to provide that, a school is much better placed, and there is only one, miserably failing, school, available.
Fwiw we follow the rules, they've just changed yet again, because apparently the only way to improve a school is by uniform rules, which is incredibly short sighted. I understand that a uniform is a good thing, but if it's so 'essential' why aren't teachers and staff required to wear one too? Lead by example?