We're going to see Mass automation and large scale unemployment because of it. Those people aren't going to eat a bullet. They're going to have to find a new way to survive. For some of them it's going to be crime, for some of them they will be organized into militaries and start wars and some of them will put the nose to the grindstone to survive and come for your job. Maybe they won't do it as well but your boss doesn't care he just wants cheap labor. With a complete lack of competition in the markets these days your boss doesn't have to care if he has a substandard product...
I guess what I'm saying is no man is an island and you can't just keep ignoring other people's problems because they're going to make problems for you whether you like it or not. And no, having a stash of firearms isn't going to help. There are millions of these people and you don't have enough ammo to shoot them all.