You might not have such a bad idea at the end there. If Historic Scotland (who are supposed to be looking after it) really went to town they might put down proper paths and make it a real tourist attraction. The sheer weight of numbers of people turning up might put the vandals off but they still might creep up at night. I was talking to my brother about this and he suggested a perspex screen put up over the wall but you could be certain that someone would set it on fire. Sigh...It is annoying because this site really is spectacular.