The race may already be lost, but still.
alternatively it skews the average towards positive: shit i found a hair in my soup! that indicates bad hygiene it the service was so good and i don’t want the wait staff to suffer! i’d probably go 3 stars but this is a thumbs down
it all comes out in the wash: 1 hair in 1 soup, doesn’t matter… many hairs in many soups, place deserves a 0 not a 3