LitChick - If I really didn't think (having researched it by visiting, meeting teachers, parents of pupils, etc) that DS would do well at the school, or be happy in it, I wouldn't send him there. I would probably move. In line with my answer to UQD below where he asks of A Penman 'what should he have done?'
I'm not saying that every school is perfect, or even adequate. And certainly not that people should be forced to send their children to any school on principle.
Just that the reputation, of an area and a school, is often based on prejudice and misconception.