What are you doing with a gun in the first place? Well for a start it is more than likely that you wont be there when the actual rape takes place. You wouldn't find out untill after. Which is where my theory comes in. When i say life for a life i dont just mean murder, i also believe that if you ruin someones life seriously e.g. rape, your life should be taken. Therefore if the judicial system worked the rapist would be executed, so you wouldn't have to use your gun.