I did not take offense at your message. And of course, I'm aware, as you note, that "... there are packets of data in the air or on the wire. A packet sniffer can show such in raw format and smart sniffers can dissect or decode such for ease of interpretation."
I was curious about aspects of sniffing such as the eavesdropper finding the correct frequency to listen in on. It seemed to me (based on my general knowledge of radio, and of IT matters) that a router that can accomodate 1 or more wireless PCs must have N channels, or sets of frequencies, for each machine. That, along with the existence of neighbors-with-routers, in turn means that there must be some algorithm or subroutine for selecting an unused channel to use. So I was wondering, for expl, if that algorithm is standard, or proprietary to each router. That in turn suggests that there may be some way of presenting the info to a would-be eavesdropper, so he can choose which device to eavesdrop on.
And so on. There are obviously lots of aspects to this, lots of algorithms and choices and ways of eavesdropping and so on. I'm curious to learn more of the details of these. Tho of course vendor mfrs are almost certainly not eager to propagate that info.