Even an online life without facebook and twitter is still fun. I think we're at a point where social networks are kind of pointless. At best, they're an easier to use alternative to the rolodex/black-book and email client. At worse, they make it harder to keep tabs on actual friends and family. So, I think everyone should weigh the effectiveness of their utilization of such products rather than being driven by fear of not being fashionable (leave that to the teenagers and celebrities).