The father of British teenager Hannah Smith, who took her own life after allegedly being bullied online, said it was "scary" he was not surprised by a survey that suggested 69% of young people have been cyberbullied.
Dave Smith said he was expecting the figures "to be a little bit higher".
Facebook has hit back at a report which claims more online intimidation takes place on its website than any other social networking forum.
A spokesman for Facebook said with 34 million UK members, it had far more users than Twitter and Ask.fm, and it would be wrong to suggest that, proportionally, Facebook accounts for more cyberbullying than other social media platforms.
An anti-bullying charity has called on social media sites to do more to prevent cyberbullying, which they claim is "much worse" than originally thought.
Research by Ditch the Label found 69% of young people had experienced cyberbullying at some point and called on social networks to put "more investment" into "the resources of moderation".
The charity also called on the Government to work closer with social networking sites.
According to the Annual Bullying Survey 2013:
- Transgender people were more likely than either men or women to experience cyberbullying.
- Facebook, Ask.fm and Twitter were found to be the most likely sources of cyberbullying.
- At least 54% of Facebook users reported cyberbullying on the network.
An overwhelming number of youngsters will experience cyberbullying research has shown.
Liam Hackett, founder of Ditch the Label, said 69% of young people had experienced online intimidation and over 30,000 young people were visiting their bullying support centre on the Habbo website every week.
More young people than ever before are being targeted by cyberbullies via social media, research has found.
A report into cyberbullying by the Brighton-based charity Ditch the Label, quizzed 10,008 young adults between the ages of 13 and 22 and found levels of online intimidation were much higher than originally thought.
The Annual Cyber Bullying Survey showed seven in 10 young people had been victims of cyberbullying and 37% of those were frequently victims of it.
Facebook emerged as the site young people were most likely to be bullied on.
The father of cyberbullying victim Hannah Smith has said her funeral will be a "celebration" of her life.
David Smith has asked her friends to wear onesies at the service, due to take place on Friday, and banned anyone from wearing black.
"Friday will be a celebration of Hannah's life, not the mourning of her death," Mr Smith told the Leicester Mercury.
"No-one is allowed to wear black and I have asked all her friends to wear their onesies because Hannah virtually lived in hers.
"I know Hannah would not want us to be sad. She would want us to be happy.
"I know she would be up there smiling if all her friends turned up at the church wearing their onesies."
Hannah Smith, 14, took her own life after reportedly being bullied on social networking site ask.fm.
Police in Canada have charged two men with distributing child pornography in the cyber-bullying case of Rehtaeh Parsons, who took her own life after a photo of her allegedly being raped was shared online.
The 17-year-old was taken off life support after a suicide attempt in April. Her mother said a boy took a picture of the alleged assault on his phone in 2011, and that her daughter was relentlessly bullied after it was distributed on a number of social media sites.
Police initially concluded there were no grounds to charge anyone, but today said that two men had been charged: one with making and distributing child pornography, and one with two counts of distributing it. The men will not be identified as they were minors at the time of the alleged offence.