Everyone seems to be under the assumption that being a hacker always has to be a bad or at least illegal thing.
There are hackers that go around breaking in to networks and then offer to fix the vulnerability for a fee. There are hackers working for the NSA and other such organisations in what they would say is the interest of national security. There are hackers employed by corporations (such as banks) whose sole job is to try and break in to the corporation's database, server or whatever so that such corporations know what they need to apply more security to.
Such people often get paid quite a fair bit of legally obtainable money at pretty much zero risk because it isn't even illegal.
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If you're talking explicitly about illegal hacking, then it depends. Where do you live, what are the stakes, who are you fucking with, and why are you doing it?