According to City Crime Rankings 2008-2009 by Kathleen O'Leary Morgan, Scott Morgan, and Dr. Rachel Boba. I'm surprised that Jackson, Mississippi is on the list and that New York isn't in the top 25. Do you live in one of them?
i def would not want to be caught walking around the fillmore, lower pacific hights, japantown, chinatown, van ness, union square, none of it.
huh??? pac heights? japantown? chinatown? those neighborhoods are all very safe.
van ness and fillmore are very long streets and large parts run through nice neighborhoods.
union square kind of after dark. the only neighborhood i'd go out of my way to avoid is hunters point and that is really tucked away from the rest of the city. no one gets lost and ends up in hunters point and if you do that kind of sucks. parts of the tenderloin can get a little gritty too for some. i also understand that if you are hispanic/black in some small designated areas (like in the avenues) you can run into trouble as well.
as a whole though san francisco is one of the safest major cities in the country.