I'm an honest person, and spending a great deal of time both north and south, I'd very much disagree with that. Hell, I live a hop skip and a jump from Davoren, other than some vandalism many years ago, never had a problem here.
Though for the sake of it, my car was once broken into, and some shit was knocked off. Though I was central then. And I've had a window broken when I parked a car at Smithfield station.
I witness the same down south, and get similar reports from southern residents about their areas.
I've been pulled for a random stop out north, wait for, 10 times. Over 8 years.
Out south? 10 times. In the 5 years that I've been a regular visitor.
How many times in the cbd? Many more than 10 times.
Be it in the daily, the Lexus, or the Sil.
I give no f**ks for the N vs S bullshit, I happily rubbish both equally, but when someone wants an honest opinion, I deliver it happily.
Elizabeth, Salisbury, Craigmore (where I live), Golden Grove, Modbury, like anywhere, there are specific areas in those suburbs you'd probably be wary of, but overall, if you're a smart shopper, you won't be disappointed with where you live.
Noarlunga, Christies Beach/Downs, Huntfield, etc etc etc, same as above.
There are places both north and south that I wouldn't want to be walking through at 2 in the morning, and places I wouldn't want to leave my car overnight, but Hell, same could be said for the CBD, or Norwood, or any upper crust suburb.
By all means, give an opinion of places you know personally, where you've lived for a period of time, but leave bias, and any second hand opinions out of it.