They're not friendly at all.
We haven't gotten official legal advice yet, but from what I can ascertain, we won't lose custody. Our courts are very into 'what's best for the child', which would means psych watching our interactions with master 7, and affidavits etc. And we would look better to the courts...despite the poly aspect. I'm relatively certain of it.
But it's always a fear for us I guess. It's not nice not being friendly :-(
I'm just as worried that master 7 may tell someone at school and get picked on for being differnt, so we've tried to explain to him not to tell people outside our family.