Even in England, they have to resort to this.
http://www.darwencemetery.org.uk/adopt_a_grave_36.html$1:
Darwen Eastern and Western Cemeteries
have 97 War Graves within the grounds.
The majority are in the Old Western Cemetery.
The Friends of Darwen Cemetery have prepared a
number of the War Graves ready for adoption.
We are asking interested families or organisations
if they would like to adopt a war grave to help
with the up keep.
An American Cemetery in Holland, all 8,300 graves have been adopted.
Not to clean the site, but to stop by, visit, bring flowers..
http://www.16thinfantry.com/adopt-a-grave/$1:
Adopt A Grave
The American Battle Monuments Commission operates and maintains 24 American cemeteries and 25 memorials, monuments and markers in 15 countries. Nearly 125,000 American war dead are buried at ABMC cemeteries, with an additional 94,000 individuals commemorated on Tablets of the Missing. Since 1945, the Dutch, and most notably the villagers of Margraten, adopted, watched over, and cared for the graves of fallen liberators. All 8,301 graves at the Netherlands American Cemetery have been adopted, and the adopters treat these soldiers as if they are their own family. Similar adoption programs can be found at the Normandy, Brittany, and Epinal Cemeteries in France, the Ardennes and Henri-Chapelle Cemeteries in Belgium, and the Luxembourg Cemetery in Luxembourg.
Actually the "adoption" of a grave isn't such a bad idea.