From US Law Shield:

Imagine – you’re getting ready to walk out of the grocery store and head towards your car in the parking lot. To your surprise, when you exit the store, you see that a violent mob has descended on the parking lot and is vandalizing vehicles. What can you do? What should you do? What if this happens in your driveway at home, rather than a public place? What rights do you have to defend your vehicle and property? These are more complicated questions than you might think.