The game rules are quite vague at the current moment. Runners/hunters can't break laws. Runners can't leave the US. If runners don't complete tasks, they will be punished. It has been said that the GPS coordinate of the runner would be shared if they failed a task.
USA Today has info that runners were spread out to start the contest, "They don't know where their plane ticket is taking them" http://bit.ly/a7UyvF