I'm now hearing a neighbour's telephone line, of all things, on 87.9 (hey, that rhymes, sort of) in my Mum's area. The sound quality is way too clean for it to be coming through a pickup coil. It sounds like someone took a Part-68 box and connected its output to the transmitter, since I can even hear the ringing voltage and calling party identification data bursts. If I turn the volume way up during the idle period between calls, I can hear a noticeable 60-cycle humming; can't tell if that's the power supply the transmitter is connected to or the power system at the local CO. If this is somebody with authority doing an actual surveillance wiretap they sure are being pretty sloppy about it! Probably just some smart--s kid playing with some equipment and his phone line, but I've been wrong before.
Don't know if our little "pirate" I mentioned earlier is still operating near the apartment complex, since as of about a month ago I'm no longer a tenant. I might just cruise on through there one of these days with my handy NS-HD01 and check it out.
[size=8pt]Moral of the story: [red]BE DAMNED CAREFUL WHAT YOU SAY OVER THE PHONE!!![/red] Every single word of every call you make or get could very well be going out over the airwaves in clear FM, over frequencies that probably 99% of the basic consumer radio sets in existence can pick up! If you don't know why this can be (read: is) a problem, well, then I can't explain it to you.