I didn't realize how old this thread was, but I'll elaborate on my previous answer. As I said I never owned one but got to play with one working at a TV station, especially late night when nothing was being aired on that system-which we usually used for program feeds and sports. CBS network programming was different system. I even would pick up the satellite TV guide at the store just for fun.
There was more that was unscrambled than one might think. The satellite feeds, designed for recording by local stations for later airing, were in the clear (Oprah, Sally, Wheel of Fortune/Jeopardy,you name it. You also could see what I presume to be feeds from the various production companies to network master control. (I saw the last episode of "Cheers" come down the morning of it's scheduled airing...Northern Exposure came down at 4am Sunday morning Eastern. NBC Eastern and Mountain were in the clear (Pacific was a "spot beam" that Easterners/Midwesterners couldn't see.). Some Mexican signals were there.
There were 874 shopping channels, and Shepard's Chapel ran 24/7. It's probably still running. One of the more interesting things I saw was Sam Donaldson, just sitting at a desk. For a half hour or so. Interesting and geeky stuff.