"Closely related is the sheer exhaustion of being constantly tapped into in the network. Every tweet I read or write elicits some small (or not so small) emotional reaction: anger, mirth, puzzlement, guilt, anxiety, frustration. I’ve tried to prune my following list so that when I do find myself engaging in a genuine way, it’s with a person I genuinely want to engage with. But there’s a limit to how much pruning can be done, when unfollowing a real-life friend is the online equivalent of punting his puppy across the room. So all day long, I’m in and out of the stream, always reacting to whatever’s coming next. Setting aside the question of how distracting this is when I’m trying to get work done, the fact is that I have a limited capacity for emotional engagement, and the code-switching that’s required when the character of my response is supposed to change every 140 characters only increases this overhead. A life spent on Twitter is a death by a thousand emotional microtransactions. I want to be pouring these energies into my family and my friends and my work."