I have to admit to being guilty a few times of re-pegging the washing if it looked messy, obviously had too much time on my hands! I can remember from my childhood the neighbours gossiping about a certain neighbour whose whites were always a dinghy grey on the line, great pride was taken in your whites. My MIL still complains about her neighbour who leaves the pegs on the line lol.
I'm surprised some people never peg out, even with our iffy weather here in the UK, most people I know peg out when they can.