Earlier quoted context omitted.
The machine does not hate you, nor does it loves you. But you are made of atoms, that it could use for something else. --- If you create an AI with a genuine utility function. And that AI manage to be gazillion smarter than you are (think the difference between us and chimps, only much greater). Then it is likely the AI will (i) convince you to unleash it upon the internet, (ii) become even more powerful and totally…
Or we might end up with something a bit like the Culture - which is pretty much the best case scenario for humans co-existing with god-like AIs: http://en.wikipedia.org/wiki/The_Culture Vinge and Stross both hint at the worst cases - and they would be pretty bad, simply having using atoms re-purposed might not look that bad by comparison: "There is life eternal within the eater of souls. Nobody is ever forgotten or a…
Worst-case scenarios are not likely for the same reasons best ones aren't - the default is AI indifference (they use you for atoms)
Since you mentioned worst, this is a must-read-classic :) http://hermiene.net/short-stories/i_have_no_mouth.html