Facebook is now full of what my daughter would characterize as old people. I know a bunch of people at work who are now into Twittering. Will the young folks abandon the 'net now that their parents (and in some case grandparents) have found it? I don't think so. But like young people through they ages, teenagers will doubtless find a way to build a wall between themselves and the decrepit previous generations. The twenty and thirty-somethings are more tolerant; possibly they can see themselves being older in the future. Or perhaps they have earned their own living long enough to be more practical. Besides, social networking takes time, and the fad may burn itself out. This amusing video suggests it might. Time will tell.
Now if they could just invent a way to burn calories by Twittering, we would all be in much better shape.