You can be social & have privacy. Check your Facebook settings.
Are you concerned about privacy? Have you thought about which aspects of your life do you want to share with all your connections? Offline, there are some things we keep in the family and other things we only want to share with close friends. Sometimes you want to tell everyone- or you don't mind if everyone knows. It’s the same online. Just because we join a social network doesn’t mean we suddenly have to lose all our privacy.
I read “Protect your privacy on Facebook -10 privacy settings you should consider”. It made me think.. and tweak one or two settings. Recommended reading.