I used to hear a guy who had a vox activated intercom on GMRS freqs sitting beside his scanner. I think he was trying to use it be able to hear his scanner somewhere else in the house, didn't realize it could be heard further away. It didn't last long, as you could always hear personal stuff being discussed too...I think he would forget to turn the vox off. I guessed it was a .5 to 1 watt, something like the ones Audiovox made. I was speculating that I was within a half mile of him. If you are getting a good signal, odds are someone is doing it intentionally, people wanting to do "neat" stuff all time, and either don't care it is not legal, or ignorant to the rules.