In the '90's I worked with a bunch of ham operators in a building next to Route 95. Perhaps the most interesting call that we heard was a guy who kept switching between his wife and his girlfriend. IIRC (it was many years ago) neither one was happy with him.
Late 90's, I heard all sorts of stuff. The one that really stands out was a girls basketball coach who was in town for a tournament on the phone with a prostitute, talking to her about the need for discretion.
Cordless phones were pretty common during that era, and they were just as trivial to listen into. Teenage me had a hard time looking the neighbors in the eyes afterwards though...
Pretty much only rich people owned cellphones where I lived, and my unlocked Kenwood TH-78E handheld transceiver gave me access to their world :)