Same thing happened in the area I grew up in, in canada, government moved subsidised housing in right in the area I grew up in under the theory that the good behaviour of the citizens in the area would somehow be contagious, but instead what happened is a bunch of criminals just moved in and turned the entire area into a shithole. When I grew up in this area we didnt even lock our doors at night and probably from the time i wasd six or seven years old I would just wander out of my house in the summer time and play with my buddies all day, with no adults anywhere. Now you wouldnt dare leave your door unlocked, even while you are at home, let alone allow your kids to play in that area, let alone allow them to play in that area unsupervised.
Its sad going back to the area i grew up and seeing it turned into a total shit hole.
Ahhhhh the joys of failed liberal social engineering run amok.