Web surfing is no longer a solo affair. Facebook, Twitter, and other social networks have quickly become an integral part of the online culture, and with them comes a whole new array of potential security threats.
Social networking is built on the idea of sharing information openly and fostering a sense of community. Unfortunately, an online network of individuals actively sharing their experiences and seeking connections with other like-minded people can be easy prey for hackers bent on social-engineering and phishing attacks. It's important to be aware of the threats, and to maintain a healthy skepticism in your online interactions.