It probably seems a ridiculous tangent to go off on but this thread just makes me feel if you want to make the world a fairer place there's a lot of other things you could do than send your children to a state school on principle, if you could afford to send them to one that you feel would be better for them.
You could campaign for WaterAid or Save the Children etc. etc. and do something to ensure more people had access to clean water, a nutritious meal every day, a roof over their head, access to medical services, and basic schooling. Of course you could use the money you saved from sending your children to our good state schools instead of a private school for these aims.
We would not be able to send our DC's to private schools - like many here, and a fact that often gets overlooked on these threads by some.
DD goes to our Cathedral School - it's a "state funded independent academy" - she's very happy there, doing well, and I think it's a good school for her.
DS is at one of our local primaries which is meant to be "Outstanding" but I'm not completely convinced on that score (though overall it's been good and he's been happy there) - anyway hopefully he will go up and join DD at her school next year.
I do feel both blessed, thankful and grateful, to the schools (and their teachers and staff) who have helped me raise and educate my children.