The adult women are free to leave at any time.
However, I don’t think the adult women can take their children with them...
Kind of a fake open door for any real mother.
Without their children of course. Where would they go? This protective custody is not exactly being under arrest, but it's hardly completely voluntary either. The young women, including both the legal adults and the under age ones, are victims as much as the children, in fact legally the underage ones are children. We can't get so hung up on getting the "bad guys" that we trample the rights of the victims.
Imagine if you will that the cell phones had been taken away from a bunch of Katrina refugees in some shelter for some justifiable sounding reason.