I tentatively don't agree with your Rindler horizon analysis. Inside an inertial frame, you don't see the Rindler horizon, because only the accelerating observer can see it. If you are in the accelerating frame of the observer, the apparent position of the Rindler horizon will vary, depending on your position, so you can't actually cross it; but in any case you are not in an inertial frame. Physical laws that hold in any inertial frame do not necessarily have to hold when observing from a non-inertial frame (for example ability to signal between any two points).

At this point, my understanding of physics gets hazy so I'm not sure how much this extrapolates to the black hole case.