1). Facebook and other networking sites “are infantilizing the brain into the state of small children who are attracted by buzzing noises and bright lights, who have a short attention span and live for the moment”. There is hardly any concentration skills required in participating in these social networking sites, and these train the brain to have poor attention span.
2). Kids are detracted from learning to communicate in the real world. There are reports from teachers that social networking is affecting kids’ comprehension levels. Also, if kids communicate primarily through the screen they do not learn the subtleties of real life communication - such as body language, tone of voice, and subconsciously sensing the molecules that other people release.
3). Social networking sites make kids more self-centered. Since Facebook and other sites give kids their own page which is about them, it leads some vulnerable kids to think that everything revolves around them, a precursor for emotional problems in their later life. This might also result in inability to empathize.
These sites make kids prone to sensationalism.
4). Pedriatricians observe that some teens suffer from "Facebook depression". After spending a lot of time on Facebook and other popular social networking sites, some teens become anxious and moody. Also, a vulnerable teen may suffer from depression when he reads great things happening to his friends, and his life is not so great in comparison. Teens who experience "Facebook depression" usually have trouble with social interactions in general.
