As if to illustrate the point that care needs to be taken to properly consider whether children are at risk from parental drug use, the New York Times has a most interesting story on how New York may well over react and handle the same issue of small amounts of marijuana very differently from California.
What matters here is that the cases are being considered on perhaps the wrong grounds - i.e. a political statement about illegal drug use as opposed to considering alternative approaches that may better serve the interest of the children. It is hard to argue that in the circumstances reported by the New York Times that the outcome is serving that interest.
See the NYT article here: www.nytimes.com/2011/08/18/nyregion/parents-minor-marijuana-arrests-lead-to-child-neglect-cases.html?_r=2&emc=eta1