Depends on where you go and who you know.
I grew up in the “ghetto” area of a small town in SoCal. Doesn’t have a lick on LA, but drug deals, shootings and robberies were common. Couldn’t really walk around outside after 10 unless you were with a bunch of people, and even that was no guarantee someone wouldn’t do something stupid. I spent two years in Brazil and the same thing applies, more or less.
Friend of my sister’s was parked in a car with her boyfriend at a playground about 200 yards away from my house. Some cholos mistook them for gang members, threw up some signs, and when they didn’t respond, fired about 20 shots into the car and killed both of them.
When I walked home from school, it was common for random packs of youths to walk up and demand, “Where you from, fool?” The ONLY appropriate response was “Nowhere” and keep walking, as they were asking which gang you belonged to. If you said the wrong neighborhood, they’d beat the crap out of you. If you said their neighborhood, they’d ask you to join, THEN beat the crap out of you to jump you in if you did.
Never had a serious break-in or home invasion, but (a) our house was a fucking fortress and (b) we often went out shooting, as loading a whole bunch of rifles and shotguns into a car in broad daylight tends to make people calm down real quick.
If you decide to do a tour, make sure-
*You know someone reliable who can show you around; the bigger and more intimidating this person is, the better. A small group also works well.
*Be polite but not meek. Don’t talk down to people.
*The INSTANT you start to sense some static between you and another person/group of people, get the fuck out of there.
*Tour a mixed working-class neighborhood, not the segregated hoods. Certain places in East LA, Compton and Oakland (dunno about the east) are either all black or all Mexican and can be less than welcoming. On the flip side, some of them are pretty neat, have good people in them and huge swathes of the neighborhood itself are safe as houses. Listen to the locals; they know which areas to stay away from.
*Stay away from large house parties, known drug areas and parks after dark. Easy to get into a fight or robbed.
*Don’t get into a fight if you can possibly avoid it, as it’s always the person you never expect who’s packing.
*Be aware of your surroundings at all times.