I remember when Facebook was restricted to folks with college domain emails. I used it for a year and decided I wasn't interested in algorithmic online stalking of people I barely knew and cared about. I'm still surprised social media turned out to be such a big hit. I guess people wanted some way to keep track of social news and the usual outlets like blogs and RSS feeds were too "nerdy" for the average internet consumer. Now we are stuck with digital panopticons and all the attendant problems associated with them. If you have kids I recommend teaching them how to properly use computational devices instead of just being passive consumers who get herded by statistical algorithms to optimize clickthrough rates.