Hacking, in general, is breaking abstractions and assumptions that most people take for granted. PG uses it in terms of startup methodology. Coders use it in terms of chopping through existing software. Crackers use it in terms of computer security models. Aaron did it in terms of "Intellectual Property", proclaiming that PACER and copyright-expired articles are really public domain.
I actually do fully understand why what happened to Aaron did, on both fundamental and systemic levels. All hacking unnerves the people who were unquestioningly taking those abstractions for granted. It shakes their faith in their own reasoning process, making them wonder what else they could possibly be missing. The hacker appears to have special powers, and sets off a deep-rooted fear of the unknown.
Which is why we presently have life changing criminal sentences for any kind of computer hacking. The kind of people that desire to punish others for pointing out their non-clothedness inherently don't understand the varying ways their abstractions can be broken. So we get a vague open-ended law applicable to basically every situation (legitimate or not), but it's only enforced when someone who feels they've been wronged manages to get the ear of someone powerful.
But all of this certainly does not imply that this state of affairs is morally right. And it certainly doesn't help to repeat the nonsense scare tactics and justifications of the machinery that punished him as if they're fact, because the whole goddamn point is that these completely open-ended laws are not true laws at all, but avenues for exercising arbitrary punishment justified by appeals to not-illegal but bad-feeling "context". No doubt had this prosecutor's son done the exact same thing, the "context" would be different and they'd have ended up with a continuance or probation in the worst case.