as a result, many parents complain that teenagers are becoming too individualistic and too isolated from the family. on the other hand , teenagers think that parents should respect their privacy. Psychologists say that if the teens lock their bedroom door, parents should just keep on knocking. Parents have the right to know who their sons and daughters are with and what they are doing. But parents must be flexible, too. Some parents are very strict and try to keep control of their kids. But in the end , that doesn't work, because it makes teens rebellious and unhappy. The more unhappy teenagers are, the more they want to be left alone. Some may even turn to the internet and give up all social encounters with family members and live in cyberspace.