Hmm, I don't think so, I was only able to get 3 different pictures because I ended up moving. Here it is, for the record (warning: poo) http://sfdisgusting.tumblr.com/
Sure is a lot of poo on the sidewalks and in public areas in SF. I don't think I've ever seen someone just pull their pants down and push out a brownie in the middle of the sidewalk anywhere else but there.
Yup. When my mom came to visit me, she came back to my apartment one night and said, "you'll never believe what I just saw." I already knew what she was going to say, it was that she saw a homeless guy pull his pants down in broad daylight next to a trash can to relieve himself.