A controversial social media site linked to teen suicides in Britain and the US is causing anonymous bullying problems in Perth schools.
Cyber safety expert Susan McLean, a consultant to Perth's top schools, said the Latvian-based site Ask.fm was a problem in "every WA school I visit".
Online bullying has become a fact of life on social media but unlike most sites, anonymous posts on Ask.fm often go unpunished.
Ms McLean said the anonymity was "a serious concern". "Each school I have visited in the past two months has had issues with Ask.fm," she said.
"There is nothing positive with the site. Kids need to learn how to behave towards each other, rather than hide behind a PC screen."
Launched in 2010 and with an estimated 65 million users, Ask.fm has been linked to suicides after victims were bullied. Teens were told to "go kill yourself", "no one likes you" and "you deserve sick things".
In just five minutes, _The Weekend West _found dozens of anonymous abusive posts directed at Perth teenagers on Ask.fm.
One who admitted suicidal thoughts was told "no one wants you around".
Nick, 13, signed up to Ask.fm two months ago and has been the target of abuse. He tried blocking anonymous posts but this also stopped friendly messages.
"I see a lot of people getting hate but then friends tend to go on that person's page and stand up for them," he said.
"When it's not hate it's fun but when there is, it's a bit of a downer. It happens a lot."
Principals said they tried to teach appropriate online behaviour but parents also had to take responsibility.
Perth College principal Jenny Ethell said the school occasionally had issues with cyber bullying but most was after school at home.
"There is always something new and Ask.fm is one," she said. "I find it appalling that this can be done anonymously and no one is made to account for what is being said." She said it was a wide societal issue.
Ask.fm did not respond to a request for comment. However, the company's Russian playboy founders, Mark and Ilya Terebin, recently responded to criticism, saying the site did not condone bullying and would review safety policies.If you or someone you know is contemplating suicide or need help call Lifeline on 13 11 14 or the Kids Helpline on 1800 551 800.