The legalities around gun usage differ across the world dramatically. In Australia, if you use a gun to kill an unarmed intruder into your household, you would be charged with murder or manslaughter.
It is all about the culture that is developed in a country. Australia relishes from strict gun laws as we have never had a gun culture in this country. We don't miss our guns, or feel that unsafe in our houses that we feel the need to be armed in our own homes.
Good information. It does vary here as well on a state by state basis. Some states require you to try to run away from someone breaking into your house before being able to shoot them, other states allow you to fire if someone breaks in(without having to try to run away and hide). There are a lot of different laws about self defense here that are different and I am sure it is different elsewhere as well.
In the USA there is a drug epidemic where people breaking in could be on drugs or looking for drug money, and in their addicted state they are very dangerous.It stems from over perscription(and the extra pills are sold on the street), illegal drugs made from buying household items and creating drugs, and from drugs coming across the border at an alarming rate.
Our nation is filled with fat and obese people, somewhere around 62% of our nation is fat(overweight) or obese in medical terms. So we aren't experiencing any kind of epidemic of people breaking into houses for hunger as we have many programs for free food and what not, it is mostly people looking to get drug money who break in and they are pretty dangerous.
I myself have been in the vicinity of dangerous stuff happening to me(someone trying to break in to my place) and have also witnessed someone pull a gun on someone else for a drug related matter at 3 am out near my place. We live in a pretty good neighborhood too. But there is just too many drugs and too much profit making/selling the drugs that creates all these addicts who have to steal to support their habits(bcause the habit is expensive).
Not sure how much of that Austrailia is going through. In the USA it is really bad though.