Bored kids have always existed, some becoming more bored than others but the extent of what they think of and what they have been exposed to in the news, entertainment, etc are far more extreme now. Long ago, the worst a kid might do is poke a dead critter with a stick, then it became 'kill the critter', wear it as a hat or worse. Now, it's get some guns, shoot people, carjack armed robbery, rape and whatever they can think of.
This is what the kids in Milwaukee are doing for fun- they better hope people don't go vigilante.