The social toolbar only shows to super admins, by default. You can open that up to other groups, like your social branding managers, if you want the ability for them to push content to your social networks for you. The toolbar should not be showing to standard 'registered' users, just so you know.
If you'd like to disable it completely, there's a setting called "Disable Social Toolbar" in the JFBConnect -> Configuration area. Just enable that, and the bar will go away!
I hope that helps,
Alex