While the pink-shirt movement is gaining ground in schools and workplaces, online bullying is almost impossible to fight.

Anything posted online is public -- a digital identity for everyone to see.

"It's important for young people to remember that the information that they post is viewable by their peers, by future employees, by future scholarship committees, and by their future mother-in-law," Merlyn Horton of the Safe Online Outreach Society told CTV News.

Kristina Jensen found that out the hard way when she criticized the controversial U.S. website TheDirty.Com on her Facebook page.

"I was posted because I made a threat to the website to get them to shut down, so my entire Facebook profile was put on the website with some of my contact information," Jensen told CTV News.

Since then, she's felt the wrath of hundreds of nasty anonymous postings, and her father is fighting in court to have TheDirty.Com shut down.

Much of what's written on the site would be considered defamatory in Canada, but U.S. law permits website operators the freedom to allow third parties to post bullying comments without fear of liability.

And Horton doesn't think Canadian courts will touch the issue.

"Just like Craigslist can provide content in Vancouver, and then still be bound by the rules in the United States, then TheDirty.Com will be the same," she said.

With no real way to avoid being bullied online, Horton suggests not posting contact information, or any images you wouldn't want to share with the entire world.

And if you find yourself being targeted, resist the temptation to retaliate.

"Unfortunately, by viewing the site, by engaging, by posting and responding to the posts. It only furthers the joy of the Dirty army that they're getting a reaction," she said.

Her advice is the same for the schoolyard and the keyboard: Just walk away.

With a report from CTV British Columbia's Mike Killeen