This scenario is exactly what the teenaged, late night, creature feature watcher wants to see!!
I have been involved with a group that experimented with the idea of TMP being the result of Bruce Morrow seeing the aftermath of an Alien Invasion and the devistation that resulted.
The invasion was a mish mash of Heinlen's Bugs, Worldwars critters, and Independence Day. Of course, OUR critters would never use a computer operating system designed around Windows!!
I mean, come on, a computer virus??????
I also prescribe to the Carl Sagan hypothesis of extra-terestrial life.
1) We are it. Seems like a waste, but at this moment, we seem to be the only sentient (?) life form.
2) There are others, they are at the same level of tech we are.
3) There are others, they have warp drive, star drive, whatever. They have not gotten here yet. Space IS big. Really, Really BIG.
My personall favorite !!
4) There are others, they have warp drive, they have been here........
Wait for it.......
For obvious reasons, they decided to leave the children in the sandbox. Maybe they will grow up?????
My $0.02
Mike