OP insists he can accurately estimate aircraft altitudes from the ground. Not believable.
OP says he knows someone who flies airplanes literally at treetop altitudes. Not believable.
OP doesn't say much about where exactly he is seeing all...
You cannot count on manned aircraft to be at 500' AGL. See post #5.
Even with structures of known height nearby, it's extremely difficult for observers on the ground to accurately estimate the altitude of aircraft, even low flying aircraft. Your...
Do you not get how stupid saying "gives me a pretty darn good idea of how high these planes are flying" is as I said you cannot judge height by eye you are guessing, if you are so sure they are breaking safety rules why haven't you reported...