This is ridiculous. Children who are not Jehovah's Witlesses are still the parents' responsibilities, and if they so choose (or have to because of the economy) to live with their parents, they should be able to do so within reason (for instance, children who are destructive toward things would not be allowed to destroy their parents' home). Religious beliefs are not grounds to kick out children that are in need of assistance, however.
Now, suppose someone critical of my "secret" society would appear. Chances are, this person is going to either be a Bible (or Quran) thumper or someone that is power-hungry and likes to control others. There are very few places to attack this paradigm (which basically means not letting others do your thinking for you, to think at all possible levels of integration, and not force or defraud others to do things against their will). It is impossible to attack a moral code of "Any volitional act that is good for self and/or society is moral, while any volitional act that is bad for self and/or society is immoral". People can make their cases for the Bible or Quran, or for a religion. But my belief that the Bible and Quran (and all the religions) lie is founded on pretty solid evidence. Thus, living with someone that is pro-religion is not going to destroy my belief that the Bible and Quran lie.
On the other hand, if you have a religion that is on flimsy footing. All it is going to take is a feather duster to destroy it. That is why they want children to be pushed out if they are not strong in the cancer, because disfellowshipped children might find just one point about the religion, attack it there, and the parents will think their own way out of the cancer. Unbaptized children might also ask questions that could expose one of the many faults (in my "secret" society, asking questions only gives me more solid answers, and I can use any source for answers and better answers at will.) Plus, all it takes is for one of them to do outside research, and the whole religion goes out the window. All because of the pxxx poor foundation.