I might be reading too much into the rules, but the rules never said anything about what happens to those who receive a live card and don't enter a shelter. There's also the dead guy. Technically the dead guy wasn't attacked by an alien invasion, so maybe it's possible to hand off your death card to someone who's dead outside of an alien invasion. There's also this one line that troubles me, "This is a game where those who you want to live, do."