this is much about basic questions like what does living together in a city means, how can we share things, take care of public space and celebrate public life. democratic processes are part of the concept, f.e. by making a public competition and voting for giving names to the cubes (what is, will be or has been good for berlin? rosa luxemburg, the berlin wall coming down, polarbear knut, trees ...?) besides that the cubes can be used to sit down and chill and they appear like mini landmarks on public places in berlin at night.
feasability thoughts / forecoming robbery, abuse:
no technical /mechanical protection (cubes must be freely moveable) but something like a 'moral' protection that can be added to the cubes, f.e. by making the whole campaign also some kind of social experiment, and the cubes a symbol of how communities work together, share and take care of public things. there could be revision events after 6 months / 1 year to see what happened to the cubes (how many left in public space? how far travelled? which districts with most cubes? ...) with competitions / exhibitions connected to it. if the cubes get an additional number to their names they could be spotted easily by citizens ('mauerfall 14 seen in görlitzer park', 'willy brandt 03 located at potsdamer platz' ...). this could be a great photo exhibition. the whole thing is very interesting in both social and cultural meanings (which cubes are still in public after one year, which have disappeared? 79 'luftbrücke' left but just 21 'rosa luxemburg' ...?)
so possible damages through vandalism and robbery are already part of this project, because they are part of the society. but the question is, how does the majority of the citizens deal with this? very exciting!