The parents will be feeling guilty, and we should put all our energy and prayers into finding out what happened to Madelaine but the truth of the fact is the children should have had some one there whilst they slept.
Nobody is perfect and yes we have made mistakes bringing up our kids, as there is no manual on how to be the perfect parent, but commonsense says that children that young should not be left alone especially in unfamiliar surroundings.
People are saying it is part of their culture to treat their children this way and thats what they do in their homeland, that is utter crap. Nobody leaves children that young alone, the parents are at fault, there is no buck passing here. Parents are responisble for their childrens safety, so Madelaines parents are responisble for their daughter being missing, if they had their dinner in their rooms Madelaine would still be with them today.