The signal strengh of a satellite transmission, at near earth level,
is not likely to be enough to reflect a detectable signal from an airborne object.
Even the cell phone transmitters only put out enough power for close range detection.
A satellite transmitter puts out even less power.
TV and cell are either VHF or UHF which are "line of sight"
(except for rare skip.)
Transmissions from other nations would have to be within that "line of sight" distance to be effective.
I bet our AWACS and other stand off radar platforms cast a huge shadow. On these passive cat whiskers.