Should parents of extremely obese children lose custody for not controlling their kids’ weight? A provocative commentary in one of the nation’s most distinguished medical journals argues yes, and its authors are joining a quiet chorus of advocates who say the government should be allowed to intervene in extreme cases. It has happened a few times in the U.S., and the opinion piece in Wednesday’s Journal of the American Medical Association says putting children temporarily in foster care is in some cases more ethical than obesity surgery. David Ludwig, MD, an obesity specialist at Harvard-affiliated Children's Hospital Boston, said the point isn’t to blame parents, but rather to act in children’s best interest and get them help that for whatever reason their parents can't provide. State intervention “ideally will support not just the child but the whole family, with the goal of reuniting child and family as soon as possible. That may require instruction on parenting,” said Ludwig, who wrote the article with Lindsey Murtagh, a lawyer and a researcher at Harvard's School of Public Health.