Visitors like to sign a guest book. The same urge can lead to defacing graffiti. Interestingly, some installations have had the foresight to forestall this.
At Carhenge–there is a place to sign:
So too at more serious memorials.
For example: The sculptress Yael Ben-Artzi, has dedictaed this work of art on the first anniversary of the assassination of Prime Minister, Yitzhak Rabin. 16 basalt rocks from the Golan Heights are sunk in the ground and signify Rabin’s roots and his bond with the land. The stones placed at different heights, symbolize the political and social earthquake that Israel has undergone with this brutal murder.
Graffiti, written by participants of the Peace Support Rally, on the night of the murder, and Israelis who in days that followed came to the place, are still displayed at the site. It has since become a place to come to for remembrance and for mourning. One can not remain indifferent when passing by the sunken basalt rocks in the pavement.
http://www.tourplanisrael.com/?CategoryID=627&ArticleID=273http://www.tourplanisrael.com/?CategoryID=627&ArticleID=273
And in Mexico City, the Memorial for the Victims of Violence allows visitors to write on the slabs:
<a href="//www.landezine.com/index.php/2015/06/memorial-to-victims-of-violence-in-mexico-by-gaeta-springall-architects/
“>//www.landezine.com/index.php/2015/06/memorial-to-victims-of-violence-in-mexico-by-gaeta-springall-architects/
On a more ephemeral local level, the Secret Art & Poetry Trail installed by Maternal Mitochondria is about to come down, as it was just for the summer. One unsolved issue–visitors started signing each piece along the trail, and some red ink bled through in the monsoon rains. In the future, we need to make the sign in scroll clearer.