Mace? Against a gun? Nah, have a gun ready to use when venturing through “those” neighborhoods, no matter what color you are.
I know first-hand of it saving a family member from a gun. You mace as soon as the guy comes towards you. It is better than nothing!
Let these areas feed on their own (and the DemonRat teat).
Ask George Zimmerman about using a gun to defend yourself from these hoodie-lums.