I think there has been a lot of thread creep here - the original thread was addressing the bringing up of children in an ideal world.

Drugs aren't the only problem here. I am aware of a number of parents who are just unable to see what their behaviour is doing to their children without any legal or illegal drugs being involved. Some of these families are well off, with good living conditions. It's not just the 'drinking classes' who don't have a clue, there is a lot of 'respectable abuse' going on in apparently normal families.