Seriously though, the sheep did a good job drawing attention to that stone on Wrynose Pass that Kammer posted. It looks a tad polished at sheep level.
http://www.themodernantiquarian.com/post/38450
The question is: Does the rubbing away of old lichen constitute serious damage (as at Avebury too), in an archaeological sense? I don't know enough about it myself, and just wondered what the reasons for concern along this line at various sites was. I do realise the lichen is extremely old, but why the fuss from the archaeologists?
Cheers,
TE.