Dog's poop - maybe. Overflown garbage cans - always. But I never saw any human crap for the past 12 yrs I live in NYC. Where do you people go? :D I feel "NYC sucks so badly" vibe when I come back from a vacation in Austria, Germany or Switzerland. But NYC still rules, not sure if I would change it for San Fran; I would love to try it but good luck changing jobs for me and my spouse "to just try it out" :\