This link above leads to an excellent article on a topic I discuss periodically. I am not paranoid, folks are really out to get us! 🙂
Aside from the time we waste on Facebook there can be a real security problem. If you write things you shouldn’t have co-workers or bosses see then you may just be foolish. But many of the more innocent things we post would pass muster if they were just not brought to the attention of these folks.
The default starting point in Facebook is for all your friends to be treated equally. Maybe this is dangerous, but its what it is. So what the linked article describes is how to create Friends Lists, and then make posts viewable just by the right lists and further how to hide information from searches.
It’s a good read. Could save some trouble down the road and still let you enjoy the benefits of using Facebook.