What makes social networking on the Internet so popular is the power it gives individuals to create, maintain and expand any number of networks to include family, close friends and people who share a similar interest, profession or hobby.

The growing popularity of , for example, has encouraged corporate marketing teams to explore the opportunities to be had by having a corporate profile; using their employees contacts for sales and marketing, effectively creating a snowball effect as the corporate message is passed from one network to another. These sites give them a direct route to targeted groups of individuals with similar interests and, most importantly, it's free.

There is no doubt that Facebook and other social networking sites have potential for commercial use but ? What are the concerns? ?

The concerns

Social networking sites are the root of four problems.