What can you do? More and more Americans are carrying a gun in the car. An ex-cop I know advises that if you have to use a gun on a youth, you should leave the scene immediately, disposing of the wiped off gun as soon as possible. Such a gun cannot, of course, be registered to you, but one bought privately (through the classifieds, for example.)
I frankly don't know what to make of such advice, but even in my little town of Jackson, Texas, I've urged everyone in my family to know how to use a gun in self-defense. For the animals are coming.