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the sum total of those tweets added up to something truly substantive, like a suspension bridge made of pebbles

The technology writer Clive Thompson calls this "ambient awareness": by following these quick, abbreviated status reports from members of your extended social network, you get a strangely satisfying glimpse of their daily routines. We don't think it at all moronic to start a phone call with a friend by asking how her day is going. Twitter gives you the same information without your even having to ask.

Like the dinosaurs, the ignoranti will eventually die out. It is just a matter of time. Until that happens I feel sorry for all those kids who fall victim to cyberbullying because their overprotective school or college denied them the digital safety/digital literacy education they deserve.