It's not to be normalised though. I sorta-knew a kid like that (he ended up living at his grandma across from our street after his family fell apart due to marital reasons); he was also mid teens or so and went joyriding in her car. Which nobody would probably find out or care about, but he ended up parking it against a tree if you catch my drift. He was unharmed thankfully, but it could have ended badly.

It might be "things that kids do", but it shouldn't be normalized or tolerated. Especially children, there's a lot of things that, until they can understand themselves, they need to be Told. How many things did you (dear reader) do growing up that, in hindsight, you think "wow that was stupid / reckless / I could've died"?