The Lovely Carla reminds me that I'm not actually a guerilla gardener, since she does the gardening. It's true. But at least I live with a guerilla gardener, I am friends with guerilla gardeners, and I am sympathetic to the cause.
There is a new movement brewing. People picking a piece of land, maybe the backyard of an apartment building or a parkway, or an empty lot and planting flowers and vegetables. People are doing this for aesthetic reasons (beauty) , and practical reasons (food!) and just for the hell of it too.
It may become essential that we grow our own food in urban environments. People are doing it now. How about Window Farms!? Yes, why not!?