back when I shared a house on the south end with some friends, the mexicans down the street would rip up and down the block in their mustang at about 80. (well, they still do.. I just don't live there anymore)

if community policing was in effect, my buddy could have waved them down, then directed their attention to me on the porch holding my rifle, then asked them politely to slow down.

it is not used because

A. self defense is criminalized and

B. [insert lazy cops comment here]