I'm always surprised by this pattern of extreme paranoia. In most of the world lottery winners are anonymous, because people wouldn't even consider cheating with this sort of thing. It would just not come to their mind. Perhaps because we don't all default to immediately assume the worst of each other? Because that pattern of thinking makes it easier to morally justify when you screw some one over as well. If enough people think somebody would cheat like this, enough people would have the moral flexibility to cheat.