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.
We don't tolerate bullying on Facebook and that's why we provide the best tools and support in the industry for people to report bullying to us or to someone else who can help them...
We work with safety experts from Childnet, the Diana Award and our Safety Advisory Board to ensure young people know what to do if they come across bullying or feel threatened themselves.
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.
Social media outlets have a massive duty of care to teen users. They are already doing a lot but more investment needs to be put into the resources of moderation.
There also needs to be stronger integration between the Government and social networks.
What we believe social networks should have to do is produce an annual external audit which would measure cyberbullying activity on a network, how many people are reporting cyberbullying and what happened as a result, and we believe that those reports should be made public.
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.
We found that cyberbullying was a growing trend within the sphere of bullying and we were naturally inclined to investigate further.
We found that 69% of young people had experienced cyberbullying and that 20% of those said it had been very extreme.
We asked people to rate the impact cyberbullying had on their lives on a scale of one to 10, with one being not severe and 10 being incredibly severe.
On average, the effect on their self-esteem was 7.5 out of 10, which can go on to affect their social lives and their optimism for the future. It's having a massive impact on young people.
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.
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.
Former Blue Peter presenter Richard Bacon has revealed how he has been targeted by abusive internet "trolls".
The BBC Radio Five Live presenter suffered nearly two years of anonymous online abuse directed not only at him, but at his wife and baby.
He has complained to police, and through making a documentary on his experience met preyed on by "RIP trolls" that post offence messages on tribute sites. He says more needs to be done to tackle the issue of online "trolling". He said:
"It's definitely growing and it's definitely getting worse. You have got to try and work out where critical comment crosses over into harassment."