Someone on here once argued with me that kids couldn't be born evil, this just strengthens my beliefs, sick, evil shits.
There are many many parents who ignore film and game age ratings and let their kids watch almost anything. If kids see violence frequently it becomes the norm. Their level of daring also increase, what we thought of as naughty in those Jurassic times when we were young is normal these days, when they want to do something more daring, it is proportionally more extreme.
I fully appreciate that bringing up kids is hard but when parents blatantly ignore the obvious and all advice, the blame can firmly land on them.
Yes, some kids are naturally naughtier than others, there is bound to be variance but it is life experience from day one that matters.