Children from a local school in Wales have also left their poetry (on stone) in a neolithic quarry on Mynydd Rhiw which has recently been excavated.. Why????

I suppose it's all about how you view and interact with sites. My personal opinion is that these monuments are not dead, their histories are still being written. I guess the local children may have been involved in the excavation and by leaving something of themselves they then become part of the quarries history. This inturn may foster a sense of ownership and belonging.

cheers
fitz