Their is more then securing the FB and so. It is also your behaviour at the internet and how you use it.
You can search for other articles her in this forum and on the Internet for topics that describe how you can do bad things out their without intention to do that.
Start to search for for example "FaceBook" in this forum and you get many tips how to use the social media and how to not do the bad thing and get sheeted.
So it is not just to secure a account you need to do, it is also your behaviour you need to look at.
Read this article I have write her that describe how easy it can be to get info of a user and track him down if you just have some basik knowlage.
http://scforum.info/index.php/topic,7587.0.html