@plethora, YOUR friends actually let professionals step in and help. The children were not just put on a train with a note taped to them or something. If these parents felt unsafe and could no longer control the child they could have called in a social worker, child services, mental health, or tried to have him placed in a facility or program for children who need intensive therapy. There may have been other options.
In the case of your friends the children were taken by professionals. They probably were under professional and adult supervision the whole time. They were placed into a setting that the case managers thought would be most beneficial. They were not just left unsupervised on a plane to Abu Dhhabi or something.
The answer to the question is of course, sometimes an adopted or even biological child needs placement in a different setting. I know a biological child that raped his sister. He ended up in a home for boys after some psychiatric treatment and rehabilitation. He was never totally abandoned by his parents. They came to his group living home and brought him presents, visited him on weekends. They did not just throw him away. However there are times when one child does have to go to a different setting for the safety of the others. Leaving a kid that is already unsafe to fend for himself is ludicrous. Dropping them off at the bus stop is not the way to handle it. This kid was 7!!! He probably knew little English to ask for help on the plane and most likely couldn’t even read signs. The least she could have done is accompany him back and make sure he arrived at whatever version of child protective or orphan services they have there.
My argument is NOT that children never need removed from their homes. Guess what. It happens all the time. My complaint is there is a right and wrong way to handle that.