Seriously. I can't believe how differently others view facebook compared to me. I log in every now and then and talk to some old friends who I wouldn't be able

Seriously. I can't believe how differently others view facebook compared to me. I log in every now and then and talk to some old friends who I wouldn't be able to contact otherwise. What info is everyone so scared of getting out? What's the harm in targeted ads? Not like most of us are going to see them anyway.