Berzerker
Deity
No, it really shouldn't. For one thing, the legal mess this would bring is astounding. Can you imagine trying to work out a ten, sixteen way divorce?
Polygamists divorce now, but if all 16 wives decided to divorce the guy at once I dont think they'd bother with legal proceedings and just did a grave

More importantly, combined with gay marriage or not, it makes it nearly impossible to distinguish between marriages and tax arrangements.
So what? It aint my job to run around determining if your marriage is heartfelt or not. Telling people they cant marry because you wont know if they're sincere is just

Of course, there's also social pressure. With one of the major legal barriers for groups like the FLDS removed, we're going to start seeing problems. Child abuse aside, in modern majority polygamous societies, you see allot of unskilled males being kicked out the commune that sheltered them their whole life because he wanted his first wife and the pastor wanted his 5th.
Driving polygamy underground helps expose problems?