What happens to the art after the protesters have gone?

The kind of crowd-sourced installation art that is created by protesters or mourners (think World Trade Center) presents major preservation problems as there is no agency or arts council to plan and oversee its future care. Joyce Lau recently reported in The New York Times (November 16, 2014, “Art Spawned by Protest; Now to Make It Live On”) that this has become a major issue with the art created by pro-democracy demonstrators in Hong Kong. With the knowledge that the city will soon clear the protest site, scores of volunteers have been digitally documenting the installations and Umbrella Movement Art Preservation formed rescue teams ready to move art on short notice and truck it to private galleries for safekeeping. Should conservation organizations be thinking about developing guidelines/instructions which might be helpful for such volunteers?