I’ve visited most of the large US cities. But the Tenderloin in SF was by far the worst inner city “skid row” I’ve ever seen. Rows and rows of tents and sleeping bags with people sat on the pavement shooting up, smoking stuff and s***ting in the street.
Yep, I used to walk through it daily as I lived in Pac Heights (top of the hill) and worked in the Fi-Di (bottom of the hill). I'd literally be stepping over bodies on the sidewalk to get to work, and you were always looking down to make sure you weren't standing in ****, needles etc. Having said that I never felt threatened or in danger when I walked through there, even at night.
My American mate who also lived in SF at the same time as I did, but now lives in London, went back a few months ago and said since the pandemic it's got worse. I'm off to Seattle for work in March and may spend a couple of days in SF catching up with people but I fear the worst going back.