It's my understanding (forgive me if I'm mistaken) that there was at least one pregnant 14 year old in that group. If so, that pretty much speaks to the truth, don't you think? And a DNA test should provide proof of who the father is.
In general, though, I agree that the government busybodies do wield too much power in similar cases. But then, in many of these religious communities, the leader tends to wield a hell of a lot more power. I often wonder how many of the people involved are truly there voluntarily, rather than being afraid to speak out against someone who controls their family.