Guerrilla gardening

Boingboing’s linked an LATimes article on the subject of Guerrilla Gardening. Individual property rights are always bumping up against the good of the collective society. There usually aren’t many people standing up for the latter and those that do aren’t usually empowered to make a change. There’s something very libertarianly socialist about this guerrilla gardening concept though and it seems like it’s generally a positive thing, besides maybe police hassles.
There are definitely some areas in my metro region (Portland), city (Tigard), neighborhood (Bull Mountain) and my neighbor’s yard (I’ll leave him be) which could use guerrilla gardening. I might just have to try to tackle one occasionally!