Google street view can help. As a for instance, look at any town on the south coast of the UK, and dishes are all seen to be pointing out to sea. No land-based towers there, so that demolishes one line of CT reasoning.
Look at any large town or city in Australia, and dishes are all seen to be pointing North, from the Southern Hemisphere. Again, look at towns or cities on the Northern coast, and all the dishes point out to sea.