The fuel needed to get two small capsules to the moon is expensive, since you start on earth. The fuel required for all of the ISS is way too much.

Also, if you pick a random place on earth, there are no humans there. You might find roads, mostly, it is water, and if not, the only sign of humand life is most likely roads, or nothing at all. I do not recall who used google earth to test this, and of course, a large scatter area for debris would alter this probability equation.