You may be more correct than you think. I’ve read several times (can’t recall where offhand) that attorneys for pro-polygamy groups plan to introduce legislation making group marriage — both polygamy and polyandry — legal. With the precedent of legalized same-sex “marriage,” Katy bar the door!
After I posted #25 I came across this FR polygamy thread: http://www.freerepublic.com/focus/f-bloggers/2929144/posts