[Mnementh]

I totally agree with you whether fiction or not the premise behind the story and the technology must make sense (wow I think the grammar in this sentence is really bad but I can't think of any other way to say it!).

If things are just unfeasibly fantastic, as your example is, then I personally can't read the story anymore as I just start picking fault with everything and that destroys the enjoyment. I have to admit though I do the same with films most of my friends refuse to go with me anymore because I just spend most of the time picking holes in the plot lol.