Usufruct, the right to derive benefit from the property of others, is generally best (and in most societies, only) displayed by the example of picking fruit from trees that overhang the boundary of a private property into public space.
A Google User named kirsten has begun compiling a map of all of the overhanging fruit in the suburb of Fitzroy.
It’s collaborative, so the map could easily become a guide to all the free fruit in the whole city.
Phil, not only can we map free fruit in Fitzroy but perhaps the whole world! Think of how such a map could help you on your travels. Like Kirsten, we are doing just that at http://edibleearth.weebly.com with our collaborative map.