I have removed the ban because "negro" is not a racist term, it is how you describe a black person non-derogatory.

The United States Census Bureau included Negro on the 2010 Census, alongside Black and African-American, because some older black Americans still self-identify with the term. The U.S. Census now uses the grouping "Black, African-American, or Negro." Negro is used in efforts to include older African Americans who more closely associate with the term.

Source: Wikipedia (the best source there is)