So it is your claim that Blacks still lie about their race on the census, in significant numbers, because they are afraid of... what, exactly? Except in rare cases, race is obvious on sight, so I don't see what they would gain by giving a different answer on the census.

Of course you presumably have a good source backing up your claim that Blacks are afraid to identify their race on the census, and trustworthy alternate statistics counting the racial makeup of the US?