Just like New York and St.Louis,the Washington DC family structure is already a mess, with rampant out-of-wedlock births and drug-addicted single mothers and their thug sons running wild. This move just formalizes their total lack of respect for true marriage.
You know the "out of wedlock births" make me far madder than even gay marriage. It's one thing for two consenting adults to do something that I don't approve of. It's a far greater sin in my mind to drag some innocent child into their parents' screwed up lives, where the child will wind up in some insecure arrangement and never be able to feel safe for their entire childhood!
But it's "unfashionable", even among Conservatives, to gripe about that.