Where I live, it's not unusual to get cut off from power or even road travel for a couple of weeks at a time. Not being prepared for that is just stupid.
But there have been nut cases building doomsday bunkers here and there since before i was born. When they start getting too elaborate, the neighbors get worried. Someone devoting that much of his life to stockpiling weapons might crack and start looking for an excuse to use them. Sometimes they just quietly fade away. One blew up, a couple miles down the road, in the 90's. Nobody got hurt, but the sheriff cleaned out the rest of the cache and the guy left town. Another one turned out to be an underground marijuana greenhouse, and the cops had it demolished.
Then there are the equally crazy but slightly smarter (?) nuts who think that the best way to prepare is to take notes about where other people's
end of the world stash is, and just buy some assault weapons to take it away from them, if needed. I guess it's the cheaper option.