I often hear this "can't walk 10 feet" story; there are homeless here but not that many; come to my office at Market and Montgomery and we can go for a walk.
Veni Vedi Velcro
Yes, I've been the San Fran many times in recent years, and I wasn't accosted once.
Whereas, in Washington, DC, they could have a homeless olympics. God, homeless(bums) everywhere.