I don't think you should be allowed to eat in a restaurant if you haven't waited tables at least once. It's so irritating when I see people being rude to waiters, like, it makes me want to slit their throats! Like, really? You're really this inconsiderate?
For some years I have spent my time on exactly these questions - both in thinking about ways to prevent war, and in thinking about how to fight, survive, and terminate a war, should it occur.