Back in the 80's, when "crack was king", I had a job that had me in ethnic neighborhoods every day.
You had to get streetwise pretty quick. Learn how not to draw too much attention, learn the danger signs, spot the lookouts, avoid the spots that were just too hot to be around, hope you are not in the wrong place at the wrong time (I knew guys in my line of work that unfortunately, were) and always......out before it got dark.
My work involved taking street photographs, and it usually caused some pretty comical reactions, not too many people wanted to be in a photo.
What was not comical was an Uzi toting lookout for a drug spot on W145th
that angrily confronted me about taking pictures, he was not playin'. I didn't stay in that job much longer.....you can only push it so far, before your number comes up.
The neighborhoods that worried me the most were East New York, South Jamaica, the South Bronx and parts of Harlem. I am amazed at how some of those same, once bombed out, drug infested neighborhoods look today, so much better.
Corny to say this but...........I met some damn nice people in those awful neighborhoods.