Sarah Lacy of TechCrunch.com, contends that social networks are good for kids. Her theory that sites like Facebook and Twitter are more about extending your real identity and relationships online and that's what makes them so addictive: The little endorphin rushes from reconnecting with an old friend, the ability to passively stay in touch with people you care about but don't have the time to call everyday. It seems Ms.Lacy looks to social networks as extensions of 'real life' personalities--but then again, what is real life? As far as her theory on social networks being okay for kids--its a new way to grow up, and for many parents, teachers and professionals, that can be difficult to accept. We'd like to hear your thoughts.