This shit has to be made up. I get it I'm white and can't have directly experienced it, but I grew up in the deep South and I've visited a LOT of it. I've also been to a huge number of large cities in North America. I started elementary school in an area so rough that more than once a year there would be gang tags painted on the playground and used condoms and shit. Elementary school! I used to travel all over for work and I've worked in places where I was the one and only white guy and places where there were no other races but white. I did work for halfway houses, prisons, schools, old folks homes, etc.

About the only time I can think of where I would not be surprised to see this level of blatant racism would perhaps be in the really wrong rural area combined with borderline trespassing. Meaning someone who is really out of place in an area he's really unlikely to be accidentally. Or perhaps super sketchy gang areas--meaning the kind of places you damn well better fit in if you want to keep anything of value on you and/or your life. Guess what, those are almost never white dominated places.

TLDR. This is fake bullshit.