Ghacks has published here a small but useful guide to basi security settings in Facebook.
Suggestions include the fact that “[…] , this menu is entirely customizable. If you do not want anyone who is not on your friends list to access any of your information then you can do this from here. If you don’t mind if friends of friends also have access to your profile then this is an option too. For example, if I wanted everyone to be able to see when my birthday is then I would first click on the ‘Customize Settings’ tab. From here, I would enable everyone to see my birthday. It is as simple as that. Let’s take a closer look at each of the different settings that you can edit when it comes to Facebook privacy. […]
First of all is the ‘Posts by me’ section. This will include any status updates that you write, any wall posts that you make, or any photos that you upload. Obviously, the most sensible thing to do here is to set this to ‘Friends only’. This is because you do not want people that you do not know getting access to things that you have said, or your personal information or images.
The ‘Bio and Favourite Quotations’ section is up to you whether or not you would like to make this section private. However, it is important to remember that you may be putting private information about yourself in the Bio section which others will be able to see if you do allow this section to be public rather than private. The ‘Family and Relationships’ section is another one that is best kept private. The reason for this is because if you allow this information to be public then everyone can see members of your family which not everyone would be comfortable with. Of course, it is up to you, but it is best to be on the safe side. The rest of the information in this section of the privacy settings would usually be better if it were set to ‘Friends Only’, because it is all personal information. […]”
I think the guide is useful despite the fact that this brain confusing level of security that is implemented by Facebook for me is still unreliable and difficult to understand by average user.
This post as a comment also here.