Albert Barnes Commentary Psalms 80:12

"Why hast thou broken down its walls, So that all they that pass by the way do pluck it?" — Psalms 80:12 (ASV)

Why hast thou then broken down her hedges?—Why have you dealt with your people as one would with a vineyard who should break down all its enclosures, and leave it open to wild beasts? The word rendered "hedges" means wall or enclosure. Compare the notes at Isaiah 5:2.

So that all they which pass by the way—All travelers; or, wild beasts. So that there is nothing to prevent their coming up to the vine and plucking the grapes.

Do pluck her—Pluck, or pick off the grapes; or, if the phrase “all which pass by the way” denotes wild beasts, then the meaning is that they eat off the leaves and branches of the vine.