Need a Midwest white house.
ChildAdvocatefag, here. Spent years working in protective services. Many families who can't pass background checks for private adoptions (too old, youthful indiscretions, poor, single, health issues, etc.) get on the list to foster (with the hope to later adopt) abused kids who come into the system. Vast majority are sincere families who desperately want a child to love. Regularly, said foster parents would express to me that the child in question, "never knows a stranger" and they marveled at how "open" and loving the child was to everyone, including complete strangers. They'd go with a stranger if approached in public, climb on the neighbor's lap they just met, etc. They always perceived this as a good thing, proof that the abuse hadn't impacted the child's ability to trust. In contrast, it made my blood run cold. Healthy children have boundaries and learn the difference between trusted adults and others who have not earned their trust. It is a healthy defense mechanism. Children abused at an early age sometimes develop reactive detachment disorder. It is a serious personality dysfunction that results, among other things, in an inability for the child to truly connect in a healthy manner with others. They lack the healthy psychological boundaries most of us have and are much more apt to submit willingly to abuse, including sexual exploitation. The foster parents would chuckle when they'd say the child would "go off with anyone" because they didn't REALLY believe the child would do something so risky ad self destructive. Unfortunately, many would. Kids like this are perfect victims. And there are many out there who fall into the hands of monsters (most adoptive foster parents are practically saints - a small percentage aren't and/or have relatives or friends who are evil).
Yes, most foster parents are great but a certain percentage are predators.