A'rite Moth... hope all went well with the great journey south. See you've got your computer sorted any'ow!
This sort of thing has been a problem on the moor for as long as I can remember..... but more so over the last few years. As you know, I wrote to Bradford Council regarding the damage to Willy Hall's Wood Stone, n' never even got an acknowledgement! EH don't seem to be in too much of a rush to find a way of cleaning it up either.
All that seems to happen is that there's a bit of a guffaw whenever something happens... then nothing till the next time. All too little, too late!
Although this may not stop graffiti on the moor, I'm sure that more education in schools on local historic culture may help to at least instill some pride in local monuments. Also, info boards on the main entrance points onto the moor, pointing out how rare and important the rock art is.... and how they are legally protected, may be a step in the right direction.