I remember hearing about people intercepting well feeds that the networks would send (east coast to west coast etc.). They would use the big old dishes for it.
This is probably made up, but I heard that sometimes the well feeds contained worse-case scenario what-if's that news stations would prepare content for in advance. Like meteors hitting, plagues, etc.
Maybe. I've seen some unencrypted emails (html page from web-based emails) hit my box. But it was usually junk when I run it for half an hour last time.