How come you already know every racist thing that can happen?so your answer to the least aggressive way to kick a black person out of your store is that you would hang a sign out front stating that blacks are not welcome in your store?
seems pretty aggressively racist.
Its pretty evident after reading your inane posts that you have an extreme amount of experience with being a racist, you already know all the tricks, can hear all of the dog whistles and are a founding member of the Internet's racism central website StormFront.
Your racism really knows no bounds does it?