Ever see a crooked baseline laid down at a HS game? Then have a roller ruled fair because of it?
How about mound heights? Been to places that looked like Everest in the middle of the diamond or a dirt spot with a rubber on it.
Fields that were tilted? Kind of graded from left field to right about 6 inches?
Point being is HS fields are often relative cow pastures and the backstops, fencing, dugouts are often old, or poorly constructed. Common sense ought to be a driver here. If the pole itself is judged to be on the line - then in left field a ball to the left of it is foul and to the right is fair. Not that complicated IMO.
Get your ass back in the dugout - PLAY BALL!