In a Newsweek article, Johannah Cornblatt explains “Social-networking sites like Facebook and MySpace may provide people with a false sense of connection that ultimately increases loneliness in people who feel alone.” John T. Cacioppo, a neuroscientist at the University of Chicago, claims that social networking can foster feelings of sensitivity to disconnection, which can lead to loneliness.

Many people have no idea who their 'Friends' are

According to a research carried out by the CNN, there is a class divide that exists that is evident even in social media. Many of the more affluent users use Facebook while many of the less affluent ones use Myspace. This hence creates a division between the platforms used by the affluent and the less affluent to communicate.

Research suggests a multitude of explanations for the digital divide including, but not limited to: education, income, age, skills, awareness, race, ethnic origin, location, and gender (which is contested as being a confounding variable); political and cultural access; and psychological attitudes to Internet access and usage. Income levels and educational attainment are identified as having the largest explanatory power to explain ICT access and usage, with age being a third important variable, which means that prototypical "victims" to the digital divide can be foremost characterized as poorer, less educated, and older.

Social media can make people more brutal about their viewpoints since there is no direct consequence of their actions. This may further harm human relationships.

http://www.youtube.com/watch?v=OdqZa0Wu4WI

"As social media continues to alter how people connect personally and professionally, its impact on building culture in the workplace is debatable.

Examining perspectives on culture and business strategy, 41 percent of executives participating in the study believe social networking helps to build and maintain workplace culture, while only 21 percent of employees have the same view.

Moreover, business leaders and employees widely differ on whether social media has a positive effect on workplace culture (45 percent and 27 percent, respectively) or allows for increased management transparency (38 percent and 17 percent, respectively)."

Social media may highlight class differences more. People with no social media due to parental restrictions or may be too poor to have access to internet may thereby feel alienated.

Some folks can be mean on Social Media sites and humiliate others.

People sit at home poring over the details of their profile(most probably fake), instead of going out to talk to people

Social media promotes narcissim. Updating statuses on facebook and spamming thorughts on twitter make us feel important. Narcissim is not celebrated in society. Unless you're Robert Downey Junior.