Orikoru
Tour Winner
I'm just trying to picture how it would go in 95% of real world scenarios really. I think/hope people would know the difference between it dropping naturally and the wind blowing it in. And the hole shouldn't be situated on slope that steep that the ball wouldn't sit still? But anyway, I would say at the very least you get an agreement with who you're playing with - not just whack the stick hope it goes in, say it's holed and walk off. ?I know where you're coming from but there is one exception, ie when the hole is below the ball on a slope.
In the original pic, if the wind is blowing the pin towards the ball (or the pin is just poorly replaced) but the slope is going down from the ball to the hole, it's possible that the ball is currently fully above ground but might fall in if the pin is removed.
There has to be a clear definition of when the ball is holed, there is no practical way to account for a ball that is not in the hole because it might have gone in if the pin wasn't stopping it.