^ It doesn't.
I guess in the end being keyed is just the luck of the draw, but most people probably will not key a car. (Or else just about everyone would be keyed) If they are out to key a nice car, there are nicer cars than boxster around, and if it is an accident then there is nothing you can do about it. You can help avoid it by parking far way from other cars, but there are no certainties.
