Sad to say this but even years ago, if I saw a brotha, his wife and kids and they looked like the Obamas in certain spots I'd go up to the brother, apologize for the intrusion and say that I just wanted to say it was great seeing a traditional black family.
I did that once to what looked like a beautiful upper middle class black family in Santa Monica, Ca , Los Angelenos know as The Promenade, touristy area, and he laughed and said 'A few sisters and a brother or two have done just that'. Sad because its so rare, you gotta comment when you see it.