To corin_ : perhaps he wanted a link to see the discussion rather than a source.
This was what I was interested in.
I don't really see why it needs any discussion as a citation, it's fairly obvious that "tapping", as in "phone tapping", means listening in to, aka sniffing when talking packets.
He's not asking for a citation; grandparent said there was another discussion on the subject so parent (and I) wanted to read that discussion.