It's a neat neighborhood, going there at night you have a 50/50% chance of being robbed/stabbed. Being in Canada and hearing someone claim how "bad" their neighborhood is makes me chuckle. Vancouver has this place called "downtown eastside", apparently the worst hood in Canada. I buy my favorite breakfast buns there from a Chinese store once in a few days and say "hi" to the same bum on the street corner. There are cops all around the place too and they even have a clean place called "Insite" where they can shoot heroine in a safe environment. It's full of completely normal people with problems and the worst thing that happens is homeless people talking to you and asking you for things.
In the meantime, I'm yet to hear about a police officer making it to the "Brzeska" street of Praga, or anyone trying to do something about it:
http://www.mwfc.pl/en/location-guide-item.php?id=296
http://www.weekendinwarsaw.com/en/places/show/s/brzeska-street/id/200/cid/2#
When I was a teenager twice I "lost" my phone and money and had a knife to my neck there. The third time I got into a fight, but that one went fine as I went with my friends and in the end we peacefully resolved the situation. It gets much more safe after you get to know some people who live around there, that other people know, though. You see people beating the shit out of each other, even kid "gangs", and other people from there just pass by and carry on with their daily lives, it's an everyday thing.
After I started working, I moved to the opposite side of the city, lol.