Doesn't seem like they are out of place at all. According to the linked Wikipedia entry, they are the perfectly natural result of normal geological processes. This seems incredibly exaggerated. Just look at the pictures in the Wikipedia entry and you can see they have numerous imperfections.These spheres are reportedly so delicately balanced that even with modern technology, they would need to be made in a zero gravity environment to attain these characteristics.
Seems like a cool seed for science fiction novel. Remnants of a ancient galactic spanning civilization leaving clues to their existence to future species. Once they develop they proper technology to probe their secrets they send out a signal to the dormant machines who awaken to kill all sentient life. Like in Revelation Space.