A purely universal and hypothetically question: Upon viewing your world from an overhead view would you designate it as a "no fly zone" if you were in the uniform of another celestial traveller? Would the subjects and objects (people and resources) of your world or perhaps a world somewhat more primative than it be barred from trade and cultural exchanges? If such a policy were to become enacted what measures would the quarantined civilization have to make? What standards would the quarantined civilization have to meet? Would there be planets designated for confiscation and dispossession?