You are on your own here. Your privacy is up to YOU to protect. Don't be stupid and you'll be fine, click on everything that pops up and you'll be in trouble!
Facebook may be listed as a "Excellent" here, but I would suggest they have a ways to go. They do not do enough to monitor misuse, hacking, phishing and inducing spam attacks. Not only that, but they make it complex and tricky to make the users experience safer by hiding privacy controls deep within account settings. I use it regularly, but I am always cautious. Here are a few tips provided by CNET that will help you protect yourself
http://howto.cnet.com/8301-11310_39-20070931-285/how-to-avoid-remove-facebook-malware/
Easy way to keep your social life with you wherever you go - Theres a app for Facebook on mostly every Mobile device. This website where you can write status' and publish photos. There is also privacy locks which you can configure, whenever you wish.