I understand what you are saying - however not all of them are bad.
My husband and I attended the semester award program at our daughter's school yesterday....they awarded certificates of excellence in various subjects and also for behvior (granted they call it citizenship).
A simple "boys and girls, we need to be respectful" out of the mouth of the principal brought immediate silence from a very large group of 4-11 year olds with absolutely no problem.
Granted our daughter is only in kindergarten and we are new to the area, but as we were leaving the building, the principal greeted not only our daughter by name, but also both my husband and I.
I agree there are a lot of bad public school systems, it's one of the reasons we moved last year - but they are not all bad.