The whole idea of what aliens would think reminds me of an old computer game called Portal (I think). The basic premise was that at some point in the future, the population of the Earth was wiped out, and you, the hero, are the sole survivor. I guess you've returned from some trip to the stars at relativistic speeds, are left with nothing but the remains of the global computer network. As gameplay progresses, you find out more and more of the network online, and manage to collect more fragments of what happened. I don't remember the ending... its either some kinda plague, or a mass exodus or both.
The idea that really scares me thought that e2 may some day become sentient, and base its ideas about humanity on us. If it did, I don't think I could blame it for wiping out the species.