[jacki]

[ QUOTE ]
most devices with clearly misusable privacy things like that will usually have some sort of immutable notification that somebody is listening, like a loud beep or something.

[/ QUOTE ]

My dad and brother worked for the phone company, usually in switching stations. I was visiting my brother once, and he showed me how easy it would be to listen in to any phone line you wanted, without anybody knowing. We didn't do it, but it would be totally unnoticed and untraceable.