What do you do when the block you live on has been so choked with drugs, addicts, and violent crime that no one seems to remember better days? If you lived on Quesada Avenue in Bayview Hunters Point a few years back, you would pull down the blinds and dread the inevitable dash to MUNI or your car. But that changed in 2002 when retired residents, Annette Smith and Karl Paige, started planting...