A family member spends time in the Embarcadero, says that foot traffic along the popular waterfront route has been decent. But even before the pandemic, the area didn't seem to have much night life after 10 PM or so, maybe due to lack of any other obvious late-night attractions nearby. Maybe I'm just oblivious, but when wandering around on foot, I tend not to feel particularly on edge, and if I encountered an area which did give me weird vibes (1990s, run-down area just outside of Vancouver B.C.'s Gastown area at dusk, for instance) I'd leave. I'm pretty accustomed to seeing people living on the streets, sometimes asking me for change. And as long as they're not aggressively panhandling, or otherwise being a PITA, I'm okay with them.
But when someone feels potential danger all around them, it can be pretty obvious. And at least to my eyes, a Leica covered in gaffer's tape is like a flashing beacon (I can probably tell exactly what M-camera you've got). My own attitude was not to care too much about the camera, so much as being aware of photo opportunities, so I'm always looking around, camera in hand, looking at the light, looking for interesting angles. And I dunno, maybe this has made me invisible.