You have your TV cable running into your house. Monarch cable has all sorts of TV signals on that same cable. I’m sure they must boost the signal as it gets further from their transmission center.
Now say you hook your VCR up backwards to the cable line. It is now modulating its input and broadcasting it on channel 3/4. A very weak signal, but it is. Imagine one were to change that signal to a different channel, something unused higher up. Then you put one of those cheapy radio shack boosters on it.
I bet you could have your own cable TV station with range determined by the strength of your booster, and where Monarch’s boosters sat in relation to you. If you lived near the distribution center, and managed to get your signal fed behind one of their boosters, you’d have your own public access channel for Prince Rupert.
Disclaimer: I’m not gonna do this, it’s just a thought.