> Bob is the first person to wake up and discovers the food dispenser. Knowing the value of this natural resource he claims it as his property. He later trades food from the food dispenser for favors from everyone else in the box. The other libertarians have to do what Bob asks otherwise they will not get food since they are not willing to break the NAP.

Examples like this often provide strong challenges to the right-wing libertarian view on property. As a left-libertarian, I'd like to offer that some of us do consider monopolization of natural resources to constitute aggression, since resources are originally unowned. This is known as Georgism: http://en.wikipedia.org/wiki/Georgism