cyberbullying

Instagram is rolling out a feature that will notify users when their comments may contain harmful content before others see them. Chandan Khanna/AFP/Getty Images hide caption

In a study of nearly 5,600 U.S. youths ages 12 to 17, about 6 percent say they've engaged in some sort of digital self-harm. More than half in that subgroup say they've bullied themselves this way more than once. Jasmin Merdan/Getty Images hide caption

Dharun Ravi appears in Middlesex County Superior Court, in New Brunswick, N.J. He pleaded guilty to the attempted invasion of privacy of his Rutgers roommate, Tyler Clementi, who killed himself in 2010. Patti Sapone/AP hide caption

Children with special needs often feel targeted by peers at school. Social media can be a powerful tool to fight back. Martin Dimitrov/Getty Images hide caption

In the past 15 years, states have passed laws intended to reduce the toll of bullying. iStockphoto hide caption

Pallbearers wearing anti-bullying T-shirts carry the casket of Rebecca Sedwick,12, to a waiting hearse in September 2013 as they exit the Whidden-McLean Funeral Home in Bartow, Fla. Brian Blanco/AP hide caption

Cyberbullies can reach victims around the clock – before school, during school, even while lying in bed at night. And in public online spaces, everybody else finds out about it. iStockphoto.com hide caption