As the recent victim of a carjacking attempt at a parking lot, ill just state that the most valuable defensive tool is situational awareness.You have to pay attention to your surroundings! If you see something that looks shady don't write it off as paranoia, and if you feel threatened don't hesitate for a moment to reach for the phone/knife/spray/gun/baton/cane if need be.
In order to get sued or arrested you have to be alive, and at the moment of trouble staying out of jail is secondary to staying out of the morgue. Bad guys aren't interested in a gun battle or close range knifefight, and as such once they see you aren't an easy mark they'll probably scram. You might be the hottest woman on the face of the Earth driving a $500,000 Bentley, but even the dumbest scumbag knows that stuff isn't worth potentially dying over. Not when there's literally thousands of other marks who won't fight back.
The more prohibitions you have, the less virtuous people will be.
The more subsidies you have, the less self reliant people will be.
-Lao-Tzu, Tau Te Ching. 479 BCE
The 1911 may have been in wars for 100 years, but Masetro Bartolomeo Beretta was arming the world 400 years before John Browning was ever a wet dream.