I honestly don't know a great deal about the topic Ladyjools...great to hear from you by the way!
I would think with the current state of acceptance it would be better to "not mention" a poly relationship on the adoption application. I wouldn't put down that I was into BDSM either though. There are some facts I would think the adoption agency could go without.
I guess it would be worth taking up that challenge if you thought some one around you might file a complaint or some thing.
Playing the Game of Life with Monopoly rules.
Monogamy might just be in my genes
Poly Events All Over