Just one thing, this is not some accommodation by ATF. 18 USC §922(A)(2)(A) quoted above is a law enacted by Congress which the ATF MUST follow.
Oh, as I recall the law requires that the shipper makes a good faith effort to insure that the firearm is not shipped to an individual with a legal disability. He is not required to go to extraordinary lengths. As in how does the FFL know that driver's license isn't a fake.
