At Reason, Scott Shackford has a valuable piece on where libertarians' interests are likely to coincide with those of organized gay rights advocates and where they are likely to diverge, following the Supreme Court's ruling on marriage. One flashpoint of controversy is likely to be the role of conservative religious agencies in areas of adoption that are commonly assisted with public funds (as with the adoption of older kids from foster care).

...It is now legal all across America for gay people to adopt children, and now with same-sex marriage, they can adopt their partner's child as well. This fight is largely over, and was actually pretty much won even before gay marriage recognition.

But there is another side, and it ties back into the treatment of religious people. Some adoption agencies are tied to religious groups who do not want to serve same-sex couples or place children in same-sex homes. They are also typically recipients of state funding for placing children, and are therefore subject to state regulation. Should they be required to serve gay couples?

Some states, such as Illinois, attempted to force them. As a result, Catholic Charities, which helped the state find adoptive and foster home services for four decades, stopped providing their services in 2011. At the time, a gay activist declared this a victory, saying "Finding a loving home for the thousands in the foster/adoption system should be the priority, not trying to exclude people based on religious dogma."...

Some libertarians I admire have taken the view that where any public dollars are involved, private social service agencies must be held to rigorous anti-discrimination standards. While I respect this view, I don't share it. Programs that are explicitly voucherized (such as G.I. Bill college tuition benefits, which can be used for seminary study) often go to institutions that I might find discriminatory, and the same logic can apply even with some less explicitly voucherized benefits. If a state depot is dispensing gasoline to rescuers' boats after Katrina, and Catholic Charities-operated boats spare the need for government boats to reach some rescue targets, the "subsidy" might in fact save the taxpayers money.

In Olson's experience, the more agencies out there serving the needs of the children looking for homes, the better. ... Much as with the controversies over bakers and florists, being denied service by one agency does not actually impact a gay couple's ability to find and adopt children at all. But eliminating Catholic Charities from the pool reduces the number of people able to help place these children. It's the children who are punished by the politicization of adoption, not Catholic Charities. This is especially important when dealing with older children or children with special medical needs. ... Allowing both sides (and others as well) to play their role as they see fit benefits all children in the system.

As for the concern that some adoption agencies take taxpayer money and then discriminate, Olson points out that it's much more expensive to the taxpayers to leave children to be raised by the state, not to mention terribly cruel. "If you don't care about the kids or the families, at least care about the taxpayers," Olson says. But you should probably care about the kids, too.

I've written about the same set of issues (in the foster care context) before. The new Reason piece is here.