Sonds like a nightmare for the families and the children. While I have no advice for the follow-up I will offer a suggestion to you and others that have minors fly unaccompanied.
To avoid this type of problem the parent(s) can retain the services of an escort. For the price of expenses and a nominal fee one can purchase peice of mind. When I state "escort" I am sure images come to mind
but I am referring to a professional security provider that is experienced in facilitating travel for individuals. NOT a "bodyguard" - but a true professional that will follow the letter of the "law" set by the parents. This person would be able to obtain medical care (if needed), change flights, certainly have the minors fed when hungry, and provide immediate and accurate information to all concerned parties.