Are people headed for the Facebook exit door? It’s too early to call it a trend, but I can sense a gathering momentum. The author of this post explains why he is closing his Facebook account. “This is part altruism and part selfish. The altruism part is that I think Facebook, as a company, is unethical. The selfish part is that I’d like my own social network to migrate away from Facebook so that I’m not missing anything.