I have a couple with two children, 9 and 6 years old. And he, and she from disadvantaged families, in everyday life talk in Russian mother tongue, from the category of "take this fight to this heroine." Children talk about the same way.
The terrible parents? I am not sure. Although not the most cultural language, but to children brought very strict norms of behavior. "Only pigs and pigs are dumped on the street" - children never throw their fantasy under their feet, but carry it to the urn, even if it has to be specifically sought. "Hate the weak fools and cowards" - children never raise their hand on animals and babies. They advocate for girls, they don’t steal, they don’t cheat. The seats in the bus are given to the elderly.
And you know, it is much more pleasant for me to see a child who speaks like a rocker, but behaves like a man, than a purely over-loved child who can both throw a wrap on a bench and beat a cat with a stick, because their parents don’t care.