This kid has been posting these for fame (it's the same guy that posted the Daimler leak). I guess it's all fun and games until he finds himself in prison
That said, I remember the shocking arrogance and total disregard (for anything but their own ego) of a few young privileged "hackers", who were involved in DDOS services for hire, and also for some very nasty IoT bot net (if I recall correctly).
Krebs wrote about them quite a bit. I think they even got caught because of that, but not sure. They did loads of real damage, that much is certain. But instead of going to jail, they got community service. Apparently with intervention of the US government, for which they now work. Go figure.