Social Networks' Threat To Security

Social networks are designed to facilitate sharing of personal information, and the more data a person discloses, the more valuable he or she is to the service. Unfortunately, these sites have poor track records for security controls. They don't encourage users to select strong passwords, and passwords on these sites never expire. This wouldn't be a problem if people only used these passwords for their social lives, but it's a safe bet that many reuse the same weak passwords--or versions of them--for all of their accounts, including at work.