Certain areas like around where you see all the protests ( a couple blocks from city hall), which is called the tenderloin has shit on every couple blocks. I have seen people shitting at least a dozen times. hypodermic needle all over. building archways always smell like piss. dont get me wrong there are nice areas, but the places that used to be decent have turned to shitholes. homelessness is rampant -- honestly, the worst ive ever seen in my life (I'm 30). The city spends like $1B a year on shit, piss, and needle clean up each year.
