There are numerous areas in the US that are scary beyond the norm. Idaho has got some, southern Oregon has some, lots of other places, some of them are even on television.

They call themselves 'survivalists'. Some of their most cherished beliefs address the potential neighbors/intruders knocking at one's door, trying too late to survive and bent on taking over one's own carefully supplied refuge.

You have to be prepared to shoot. It is a matter of survival...

Of course, if you're not home when all hell breaks loose, you will be the one pounding on others' doors. :)