Just to address a couple of NAO's comments (and not to get at you NAO, but you did say you're here to learn more):
"I just think school is a melting pot - a self limiting one but still one.
My children mix with the villain as well as the angel - the gay/straight/black/white/nasty/nice/clean/dirty ad infinitum
This is a wee bit more like the real world than my four walls and i like that. "
So is HE - home-edding families come from many different backgrounds, cultures, sexual orientation, etc. HE crosses the boards, my children mix with children from many different backgrounds.
"A cross section of society far exceeds my family and friends.
I want my child to mix with people who are not necessarily 'of my choosing' "
A few people at one of the local HE meets I wouldn't choose to socialise with (or for my children to) - but we go anyway, there's people there we do get on with and we just 'manage' the others (after all, we can't expect to get on with everybody).
"But i dont see how your childs interaction with a shopkeeper could comapre to playing every lunch time with boys and girls from 3-11 years....from ALL walks of life..
Childrens social development is freer -i believe- outside the contstraints of the parental eye"
It appears that you are assuming that HE-ed children never leave their parent's side. In our case my eldest son needs support due to his difficulties in this area, but my 9 year old had plenty of 'social development outside the contraints of the parental eye' - as do many, many HE-ed children who play out just like their school-attending peers.
School is not a natural environment for children (IMO) and as an institution to 'educate the masses' evolved very recently more as a form of subsidised childcare and means to train up skilled workers than some utopian vision of nurturing a life long love of learning (something that has become a 'buzz-quote' of recent governments).
Schools are (IMO) fairly rigid in their provision and do not allow for what I would consider to be particularly natural opportunities for social development, unless as an adult one spends one's time in a very narrow-aged peer group.
I'm certainly not about to get drawn on the many opportunities for negative experiences of social gatherings that are available at school, suffice to say that my son's social difficulties were concreted through 2 years of persistant bullying which the school refused to recognise and led to his arm being broken by a group of children (along with generally being beaten up, bricks being thrown, etc, etc.)
As someone with children 'in both camps' I would certainly say that HE offers the better social opportunities.