10 to 15 years ago I heard my first cell phone's in the 800 mhz band, heard a drug deal being made, a couple breaking up,,, creepy, never listened again.
When I was a kid, I made a full wave loop for 47Mhz cordless phones and could hear neighbors up to a couple blocks radius from me. You hear things you would never have expected...and you then have a hard time looking some people in the eye again heh.