The General hit the nail on the head about the drug problem. Families,tribes have been doing this ages. Until you can find a way to replace this source of income so they can take care of their families nothing will get done. Simple crop replacement will not work unless it provides the same level of income that the Afghan's are used to. It is true that this should be a Afghan police problem, however I doubt they can handle it.

The other problem is that culture thing again. They really don't think they are doing anything wrong, and I suspect the US intervention is viewed as a form harassment more than anything else. If possible the US should stay away from this and let the Afghan's handle it.