The Bay Area's finest export. Rising property values and the accompanying homelessness. Why not build some toilets? Has anyone tried? There are designs for public restrooms that are essentially self cleaning (hole in the ground with high pressure water nozzles in the ceiling). If you can't even have enough decency to build a place for someone who has been thrown out by every other part of society to poop, it seems entirely fair that they choose to do so on your stoop.