I won't say what my first reaction was. (I've calmed down now!)

When I was up there several years ago I did something similar (struck the stones that is, to hear the different tones they made.....didn't record an album though :) I'd heard some of the rocks had lithophone properties.

I'd hardly call it vandalism though as someone stated somewhere in the thread. Many of the rocks (like those bashed in the clip) have eroded out of the bedrock anyway. A small digression, my mate Steve is a geologist, and he basically told me that in terms of geological erosion processes, it's the substrate ('everything want's to' he said) returning to it's most simple state/form (or something like that, I'm sure he put it more elegantly).