My 2 cents... We're all agreeing on the same thing about the issue. We just happen to say things a bit differently.
People can just be really insensitive to downright mean, but they can also be incredibly kind and wonderful. Mostly, we've experienced the kind and wonderful but there have been other experiences, too.
The "are your kids adopted" line cracks me up. No, they are not, but I am.
I know when Mr. Clean and I went to get our marriage license (in another southern state &, no, it wasn't GA) we were given the once (and twice) over look by a number of people in the clerk's office.
We have had incidents here that were interesting, to say the least. The last memorable one happened at the beach access near our home. The "gentleman" (serious sarcasm here) tried to avoid looking at our family while we were showering off and he was headed to the beach. I thought he was going to break his neck turning the other way and trying to walk past us. Mr. Clean made him speak, but after that, he glared at me out of the corner of his eye. I was shocked at his treatment of us and felt that he considered us less than human, especially me. He was a local.
To put it bluntly, I don't give a flip what someone thinks about IR marriages, as long as they don't disrespect or try to do harm to our family. That's where the line is drawn.