I worked in FiDi, I worked in SOMA, and I worked in the Western Addition for many years. I saw a lot of shit (literally), addicts shooting up on the Civic Center station steps, my coworker got punched in the arm by a homeless person on the way home. I've walked through the Tenderloin at night numerous times (some of the best food in the city). Yeah, there's some nasty stuff going on. But the comments here make it seem like SF is a lawless hellhole, a failed city. This is just not true. I never felt too unsafe, and I explored the city on foot by night constantly. Of course everyone takes a chance walking around at night in a US city. I love SF and I intend to visit again someday soon.