Originally Posted by BushmanLA
Ask them at what point up above the ground does my airspace become their airspace.
If were are talking about flying an airplane the answer is ground level. We don't have any personal airspace in which we can fly without compliance, except of course for my special waivers. At this time we can continue to use airspace for breathing without a license but that is subject to change.
Ground effect machines would seem to be an exception but thet are not considered by FAA to be aircraft.