[neutralino]

Interesting post, Lloyd. However, I think there are complications with some of the points you make. Firstly, in general relativity gravity is no longer a force, but is the curvature of spacetime. Gravitational waves are then caused by fluctuations in the curvature of spacetime. Now, if we were talking about gravitational waves caused by, say, a mountain on the surface of a spinning planet then we see how the fluctuations in the curvature of the spacetime (i.e. the fluctuations in the "gravity") are formed, but in a black hole it is not so easy to say where these fluctuations will form; i.e. where is the mass inside a black hole? I don't think anyone really knows, and so one cannot say that gravitational waves formed by the black hole will not escape the event horizon.

Just my thoughts, anyway.