In many states, even the adoptee doesn't have legal standing to force the records to be opened [which is a hugely controversial topic in American family law].
So I've read, but I can understand both sides of the issue. It's a tough call, and there's not always a happy ending.
By the way, you wrote previously:
"The theory holds that there may have been not one, but TWO adoption/legal guardianship changes during Barack Jr's childhood: The first, circa 1965/1966, would have made Lolo Soetoro his legal guardian, and would have sealed the 1961 records, and the second, circa 1970, would have made Madelyn Payne Dunham & Stanley Armour Dunham his legal guardians, and would have sealed the circa-1965/1966 records."
I don't see any rationale for the grandparents to adopt him. If they assumed legal guardianship, which would make more sense, since he was a minor and his parents were living in a distant country, a name change wouldn't necessarily take place. There's also been no suggestion, from what I've read, that anyone knew him as Barry Dunham.