I am arguing against your idea that people who use drugs or who have addictions are automatically bad parents. Well not even bad parents, but murderous ones.
"Yes repectable middle class 30 somethings can be child abusers too, but they don't tend to farm out babies to crack addicts for fag money, on the whole, as far as I know."
Your point there seems to be that you are making judgements about people based on their class. And that if they are middle class abusers, this is somehow better than being lower class crack addicts, even ones who aren't abusive.
All addictions can be very dangerous. Look at that case abroad recently where a couple allowed their real baby to starve to death while they spent 12 hours a day online lookign after their virtual baby. Meanwhile a load of people who used crack failed to abuse their children.
You can't make assumptions like this. Some households which seem grotty are, maybe even most, but not all. And the reverse is true.
Resorting to all this "crackhead scumbag" stuff diverst people's attention from abuse which is happening in "nice" families.
And yes this woman was niave and stupid. But should she go to prison? No.