Answering the telephone was hit-and-miss. Seems they knew that properly they should always answer "Sheriff's Office" yet they didn't always do that. Sometimes they just said "Hello."
And while I have your undivided attention, Aunt Bea was quite a regular on the show, yet Francis Bauvier never got top billing like Andy and Ronny and Don received. I suppose I should have brought this up years ago when it might have done some good. I know little Opie had a spiffy, nailed-down contract. His Aunt should have had one in heavy concrete as well.
They really should have an unlisted number.
In the gold truck episode, after half the town turned out, Andy goes and reveals what the Treasury men are about to do. Going to the filling station and also take a lunch break. Poop, Barney isn't the only one who can't keep his mouth shut.