I have to agree that this is an awesome sight (& site)
The problems that are present at this place are very similar to those at other RA sites... should we be able to have access and encourage visits but at the same time risk damage... a very difficult subject.
I know this subject has been discussed before by HA - see http://www.heritageaction.org/?page=heritagealerts for example...
Hmmmm.....