Yes. The problem is scale and pervasiveness.
Ethics didn't matter on an Apple ][. Well, not much. You could screw around, break stuff, "should" didn't come into it, you couldn't really touch the parts of the world that matter. Even people hacking phone lines and banks were small-time for the most part.
Zuckerberg wasn't particularly original in his thought process, there'd been many like him before, but I think Facebook was the pivotal moment. One, because it was for everyone (even more so than AOL), two, because it was personal in a way that previous social platforms (ICQ, Usenet, Compuserve) hadn't been, and three because by rigidly enforcing real-life identities as the norm, it collapsed the context between online and offline.
Ten years earlier, lonely-bored-horny-smart dudes would have joked about building an app to be vaguely creepy around hot girls they were too shy to talk to. Heck, that's basically the plot of Weird Science - by 1985, Hollywood knew that's what geeks were like, so we can guess the first time that conversation happened was about 1972.
Smart little boys breaking the rules on an Apple ][ are interesting and funny. When they end up running the world but haven't grown psychologically, it's downright terrifying.
Same goes for 25-year-old stoner douchebags making edgy shitposts on 4chan, and those same people when they're 55 and worth $400Bn. With power, responsibility. Grow the fuck up.