Thought experiment on fake gravity

If you can manipulate gravity, that doesn't automatically give you an reaction-less drive, no? I'm kind of imagining creating a gravity well in front of your spaceship and falling into it, but wouldn't that be like pulling yourself along by your shoelaces?

Obviously you could still use it to stick yourself to the floor and avoid the disadvantages of freefall, stop smashing your passengers at high acceleration, deflect space debris, or create very small black holes in your enemies' stomachs :)

Torchwood: Meat

( Spoilers )