Nearly one in five young people is a cyber bully...

A study by online identity experts has found almost a million youngsters are using the web to harass and abuse others.

Social networking sites are being used to post offensive messages and even steal other people's identities.

But what should you do if you're being bullied?

* Tell someone: a parent, a teacher or call ChildLine

* Don't reply to any messages and keep a copy of any abusive texts or emails

* Complain to the host website or your phone provider - bullies can be traced

Jan Chang from the East Midlands branch of ChildLine says, "It can be devastating but parents should talk to their children about what's happening...Parents can monitor their children's computer usage and maybe keep computers in the living room".   

You can contact ChildLine on 0800 11 11 or click here to check out their website.

Schoolchildren in Leicester fight back...  

Films made by schoolchildren about staying safe on the internet have had a special premiere showing at Loughborough's Reel Cinema.

The films were made as part of a Netiquette competition run by Leicestershire County Council and aimed at getting children thinking about how they should be using the internet in a safe way for themselves and other people.

The schools could choose a subject of their choice, from 'crashing chatrooms' to using inappropriate language on websites. Winning story boards were then made into short films. These are now available for educational use by other schools.

The winners were Belvoir High School in Bottesford. Their video called Crashed is about a girl who bows to peer pressure and "crashes" an on-line chatroom. Below is a short taster.

Also winners were a group of boys from Mountfields Lodge Primary School in Loughborough. Be Cool is about 4 boys sucked inside the computer they are using to learn about the Netiquette rules.

Click here to find out more about Netiquette from Leicestershire County Council.