Consumer Reports: Survey shows that 20 million active Facebook users are under 18, 7.5 million are under 13

The latest survey by the U.S. magazine Consumer Report on September 17, 2011 showed that among the 20 million active Facebook users under the age of 18, 7.5 million are under the age of 13.

Since Facebook stipulates that users must be at least 13 years old, these people have actually violated the company's terms of service. Industry insiders believe that since children's minds are not yet mature, exposing them to social networks may lead to some risks.

Consumer Reports recommends that parents monitor their children's accounts and join their friends on Facebook. For younger users, they should delete their accounts or report the problem to Facebook. In addition, they can also use Facebook's privacy control and other features to protect their children.