Well with all the talk and all the discussion about Facebook in the end it comes down to one thing. Are your profile security settings really providing a safe and secure Facebook listing or not. As you've already realized that's not something that is easy to figure out.
With all the complexity and various levels of junk you must go through just to try to set everything it's almost impossible for most people to do. And when your done have your really dotted all of your i's and crossed all of your t's.
Luckily someone has come to your rescue and set up a site just to help you get it right.
Now all you have to do is go to Profile Watch and in about three steps and in only a few minutes you can have your profile rated. I'm not sure who is behind profile watch but they have done both a great job and a great service by making it easy to truly know what your security settings leave open to the public.
Even nicer is that they have several article links there to help you fix what you find wrong.
So check it out and lean the facts and stay safe.