Ouch!
So if I under you correctly, Mexicans and Blacks who drive old vehicles can move next door to you and open an auto repair shop only if they increase your property value. But if you believe the property value decreased, you will use the power of government to stop them or get money out of them. And if it both increased and decreased circumstantially, I guess you would figure out which one pays you the most.
I guess you think good home cooking restaurant owner's should be able to sue cheap fast food restaurant that open up in the same small town for decreasing the value of their restaurant with cheap quick hamburgers.
Lawyer, lawyers, lawyers, or do you prefer neighborhood block wardens. Fascism has arrived - seig heil.