Guerrilla Gardening is political act - a form of non-violent action, towards issues of land rights, land reform, and permaculture where its activists recover abandoned lands for growing flowers, crops or plants.
Scattering seeds is the easiest way to guerrilla garden—just toss them and some will live and flourish, whilst others won’t. They just need to land in favourable growing conditions. You can even do it while driving.
It can be considered eco-graffiti for a green generation, being adopted even by multi-national coporations
more via Wikipedia and Primal Seeds