Excellent security advice for Facebook and other social networking environments:

Facebook and Social Networking – 11 Best Practices
http://blog.zeltser.com/post/8503487922/11-social-networking-security-tips

QUOTE: As a handy guide, respected security expert Lenny Zeltser has devised 11 Security Tips For Online Social Networking. Many of these are variations on general-purpose best practices, but they’re all good advice. Having covered the risks related to on-line social networking on several occasions, I’d like to outline my tips for using these services securely. In compiling this list, I tried to stay away from impractical recommendations, and did my best to base advice on actual occurrences, rather than theoretical threats: