Oh, it would work 90% of the time, until someone broke into a home and tried to kill your family and/or rape you or your little ones... then the criminal would have a better chance of accomplishing their goals.
But if NO one had a gun, and if we didn't have people with a criminal mentality, then it probably would work quite nicely.
But now adays, I wish that we did live in a world where there were no murderers, rapers and other violent type of criminals out there victimizing innocent people. I do believe that using a gun on another human being should be as a last result and if at all possible, killing a human being should be avoided at all costs. But the truth is, if someone was to break into my home and harm my children and/or husband, I don't know what I would do. I know that with my dying breath I would do everything within my power to protect my family.