Have you ever seen the Mythbusters episode where they shoot a water heater through the roof of a house?
High pressure steam should be kept as far as posible from friends, loved ones, and favorite body parts.
At risk of sounding trite...beating that is simply engineering. There are already plenty of home generators powered by gasoline and diesel. Think of it, you actually have explosions going on in those constantly. Once upon a time, working with gasoline was considered "extremely hazardous".
And the original designers of the Stanley Steamer solved a lot of those problems. You keep the actual size of the boiler small (minimize pressure stored energy volume) and cycle the working fluid faster.