Loopy, I agree with you - I don't think teachers should be thin, non-smokers, never drop their aitches etc. So neither shoudl children.
That aside, I am aware that a great deal of the stuff that annoys me from the school is Government driven. The extent to which schools need to be compliant is a moot point though as it's apparent that it varies greatly.
My feeling is that 'looking after' and 'feeding properly' are highly subjective and what is right for one child isn't going to be right for another. For example it's obvious that the current system of weighing and classifying children as 'obese' is hit and miss and children who are actually leading very healthy lifestyles are being frightened unnecessarily. Another example is that of a family near me where the parents believe their disabled child should only be in primary school part-time but the school disagrees simply because another child has gone through the school with the same condition and went full-time, so they are taking her to court.
The problem is that when subjective judgements are made as to what is 'proper', the State then intervenes, and then get sit wrong. Hence we have everything from cheese only being served once a week in school lunches because it is a 'high fat food' to forced adoptions.
When I look at families around me I don't care if the child is sucking a fruitshoot or is wearing scratty clothes. I care if the parents are talking to them, playing with them, in short, loving them. The State can't legislate for that.
The most heartbreaking thing I've seen in a long time was a little boy from dd2's class at sports day. His mum and dad went off with their dd to have a picnic on the field an ddidn't bother watching him race, so he started to cry. My heart broke for him so I started to cheer him on. But it's not my job to go and berate his mother for it.