I heard on the news today about a local "couple" that were sentenced to jail for locking the woman's 3 children in a hotel bathroom for up to 9 months. While I agree that the man and woman involved deserve whatever results they get, I have to think of the adoptive parents of these children.
They are guaranteed to be very confused and messed up and bonding with even an outstanding adoptive family may be incredibly difficult. In addition, they probably will feel a tight bond with their mother and her "boyfriend", in spite of the cruelty the mother allowed and the boyfriend inflicted.
I wish I had idea on what to do about situations like this. Blindly jumping in is not a good idea though, as I would almost guarantee their family will have serious problems when they are teens.