You have a point. I have less personal experience with social sites, but it seems to me that the more information about your relationships you build, the harder

You have a point. I have less personal experience with social sites, but it seems to me that the more information about your relationships you build, the harder it becomes to leave. Think of leaving Facebook as losing your phone and the contacts you have on it. It's up to Facebook to make it like this, but the potential is there.