Collection of stones and detrital

Since Tempelhof - the inner city airport of Berlin - has been closed, representatives and the population quaral how to use this vast urban space. Every time I manage to run around the former airport (about 7 km), I take a stone from the ground and declare it to be my private property (without anyone noticing). By removing stone by stone I'm infiltrating the conflict about public property. Currently I've accumulated about 5.2 kilograms.