To be honest, I didn't know some dangers on internet for children. However, I am very surprised after watching the video which Jeremy vine examined.
Nowadays, more and more teenagers like to put their real information and photoes on the profiles of website to make friends. For example, they put their real names, ages,sexes ,schools and attrative pictures on Facebook, MSN, my space and social network and so on to chat with strangers. What's worse, some teenagers give their own adverstments to strangers on street. I think it's very ridiculous to explose their private information for strangers. So in a result, some teenagers are cheated and at the same time they waste their time. Some offenders meet up with school girls and abuse them.
Parents should make safety for their children on the internet. They can pay much more attention on paying more time to conmunicate with their children and to be good friends of their children. Also they can put computers in public places. In addition, the government should do something to protect teenagers on internet website. For teenagers themselves, they should control and take care of themselves as well.