Maybe yes, maybe no. Presently public policy is influenced by the size of the African-American racial category. If you set up a new one, as some have urged (the tiny 'interrace' movement), that raises a question as to the distribution of resources by 'race.' To identify as 'interracial' rather than African-American might imply foregoing certain opportunities. Inertia has a malevolent effect. Lind -- once again -- is pretty good on this.
mbs