It may sound ironic, but the CEO of social networking website Facebook, Mark Zuckerberg, made headlines recently for being cyber-stalked.

Cyber-stalking occurs when an individual uses the anonymous nature of online tools such as  e-mail, blogs, social networking sites, micro-blogging sites like Twitter, as well as other forms of electronic communication, to stalk and harass someone.

With the rise of location-based services such as Foursquare, Twitter and Facebook which recently launched its "check in" function, users are more vulnerable to being victims of cyber stalkers.

RazorTV speaks to victims of cyber-stalking, including celebrity blogger Crystal Shong, who related her harrowing experience of being stalked by not one but three different people.