It's A Nice Concept for A Film...

but it's so insanely far fetch that it does not work. Imagine this was a real thing and all you would do to avoid being a victim and now imagine everyone else doing that too and then some. Everyone would be so concerned with self protection that they would be less concerned with killing someone. The rich would basically take a vacation by leaving the country and how many people would go off the grid so they could not be found and now add on all the guns people would own. For this movie to have a premise it required a family of moronic kids to create a bad situation. If you have their kind of money and have no intention of killing you would be out of the country that day. Not to mention if you did stay you would have a lot more guns than a revolver and a pump action.