http://en.wikipedia.org/wiki/Hydraulic_fracturing
The Rocks are lovin' it. They are up for a bit of hyperspace if no one wants to join 'World Peace'.
However 'we' have an understanding that rogue rocks have a lonely life, and generally have to put up with being repositories for ice trails, Aka, 'Comets'.
Just mind the next mine you dig, they like a bite out of the bum now and again.