In the 80s and long after the
Ok, so.
While CB radios are still sometimes seen today, granted not in nearly the numbers of the 1970s heyday, but still occasionally......
when was the last time you saw an actual CB radio with a telephone style handset? Here is my Realistic "CB-fone 40, model TRC-426 Nine Scan"
(Yes I do realize marine "ship to shore" radiotelephones had such handsets, but this is a full on CB radio with one

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In the 80s and throughout the 90s, CBs were used in the highlands above the valley to warn that county sheriff's vehicles were heading up the hill. It was like a jungle telegraph letting the various illegal pot growers know that the cops were in the neighborhood.
That was a time when marijuana was said to be the county's biggest crop, even over apples, pears and cherries. Few residents had hardline phones and, of course, before cell phones and many of the residences, if there was one near the grow, were little more than small cabins or shacks.
The other prime users of CBs were the apple orchardists themselves. They were some of the earliest adopters of cell phones in the valley (that and real estate agents of whom my father-in-law was both). He had an early bag phone and service was sketchy at best.
Working on the newspaper, I was often invited to go on a ride-along with the deputies as they were doing marijuana interdiction in the hinterlands and the sheriff's deputies themselves well knew the word would spread fast about what was going on. Fun times.
Now, of course, at least in rural Eastern Washington in Okanogan County, where we have lots of sun, those illegitimate grows have been replaced by legal marijuana grows. No more cat and mouse in the Okanogan Highlands.