People want to adopt a perfect child. Or at least one they feel they can accept. Unfortunately, what they often get are very damaged children. It is not unusual for adoption agencies to lie about a child's age until after the papers are all signed and the adoptive parents are "trapped". Children often are severely damaged with huge psychological issues. And there aren't a lot of resources to help these parents.
I have seen cases where psychiatric facilities sent home suicidal teens because the family didn't have insurance or any way to pay for the hospitalization they recommended for the teenager. The advice to the distraught parents was "well, just watch them 24 hours a day until the current crisis passes".
This was after recommending that the child be hospitalized....until they found out the family couldn't pay. So, imagine what these adoptive parents go through when they become afraid for the other children in their house?
Not all adoptive parents deserve sympathy. But, as people keep telling me. There are no "black and white" rules that apply for every situation.

(really not mad but this emoticon seems to capture the frustration nicely)
"To create more positive results in your life, replace 'if only' with 'next time'." — Author Unknown
"Experience is a hard teacher because she gives the test first, the lesson afterward." — Vernon Law