He's a kid that "found" some pictures of an upcoming game, using dodgy means. But these pictures were publicly accessible, he didn't deceive an actual human to get them. Making them hidden, but public was a mistake by the company.
The real reason this happens is that the police doesn't understand, wants to punish the kid ... and youth services has lobbied so that locking up minors DOES NOT REQUIRE PROOF at trial, does not even require an actual accusation of a crime, in fact the kid gets none of the normal legal protections (because this is a 6 month prison sentence, in that the kid gets locked up, and could be an 18 month prison sentence)
During this time, the kid will be denied school, denied access to internet, books, friends, most of his family, he will be physically locked up (sometimes in solitary, although they get regularly accused of locking up autistic individuals for weeks/months). Oh and there is CONSTANT violence in these places.
But fundamentally this happens because there's no fair trial for minors. Why not? Youth "protection" keeps complaining that with the actual legal rights they can't do their job (or arguably even human rights, schooling, not being locked up unless convicted with full legal rights (not the case here), not locking up long times in solitary unless absolutely unavoidable (ie. NOT because of lack of funds and therefore no personnel for supervision), ...)
A fair trial against this kid would have failed since he was caught by illegal means (the police committed a crime to lure him into a trap, which is NOT legal, and frankly totally immoral).
I hope if you do security related work, remember this case. If you expose a security vulnerability, and get offered a job, there's now many examples of that job being an excuse to get you thrown into prison for years. Oh, and DESPITE this being totally illegal for the police to do.
Youth services can't do their job with normal legal rights for minors, because minors talk, and are aware with youth services offers (getting locked up without school, without friends/family, with constant punishment, and then at the end of it getting kicked into the street without any help). Although Youth Services lies about this to kids, it tends to be well known in the cities and "results in a lack of cooperation" (translation: kids, correctly, reason that they're better off abused than helped by Youth services). Oh and it doesn't help. Especially because the "kicked to the street" part, especially kids that don't have parental support for some reason, immediately turn to crime. And, of course, after a place like this, they don't want to be helped by anyone and hate the police.