Who cares. Don't rob people if you value your life. This is particularly pertinent if they are armed; and good luck telling who is concealed carrying or who realizes the 1-ton machine they are at the wheel of is a damn fine weapon.
I'm not a huge fan of sins-of-a-father, but absolutely take it out of the robbers' estates. An emotional hardship sum should be awarded too. Being robbed at gunpoint is a traumatic experience that the robbers' estate should also pay for.