I know over spinning most AC motors will turn them into AC generators. Is the same true of shaded pole motors?
Yes, it's an induction machine.
Nonsense , AC motor could not generate a drop of AC power no matter how hard you spin it.
Yes. It will generate power back into the AC supply. Some induction motors can be coaxed into generating into a load with a capacitor attached but without an AC supply connected. However, that is not a very reliable or versatile set-up.