[arethuza]

An American billionaire or (billionaires) sitting on a completely undefended island somewhere...

Don't you think that would be a magnet to just about every terrorist organization in the world? Not to mention if it is anywhere near East Africa I would image a few boat loads of real pirates turning up pretty quickly - even in a lot of what would look like safer neighborhoods I would expect you would start getting a lot of attention from organized crime and other very scary people.