Scoble is the counterexample to mature restrained online presence.<p>There's been a lot made of the oversharing which occurs with teens and 20-somethings on Facebook and other social networks, often painted as a generational change.<p>For those of us who were alive and tech-conscious in the 1990s, there was a very similar trend, though rather smaller (as the Net and Web were also much smaller), of a small number of high-profile "online diarists" who shared, often fairly compulsively and excessively, life details.<p>Some remain online, some have largely disappeared, some are much more muted than previously: Eve Astrid, Xeni Jardin, Rebecca "Net Skink" Eisenberg, Violet Blue, (many were notably women), and some of the early bloggers: Dvorak, Ito, Weiner, and others.<p>Andersson at last check worked for Google. Jardin continues to blog for Boing Boing, though more quietly since a dust-up with Blue and recent breast cancer diagnosis. Eisenberg is corporate counsel at a tech company. Blue continues her sex blogging, though less prominantly than I recall. Life, jobs, relationships, breakups, kids, and the like, tend to take the edges off over time.<p>It's something I'm presuming FB and G+ will discover over time. Google's approach has been more nuanced in part, I suspect, as its creators were more mature than Facebook's.<p>Past age 35 or so, the most voluble social networking types tend to be those with a vested interest in noteriety. Mostly marketers, entertainers, other media types, technology evangelists, CEOs, and VCs.