The police consider cyber violence a serious crime and have an active program educating the public how not to fall prey to online attacks, or to become the perpetrator.

Charges laid are steadily on the rise with nearly 150,000 cases last year, but they form just a minuscule portion of what goes on and there is no good recourse for the victims in a country once touted as one of the most wired on earth, police say.

“It’s rather simple with physical violence, as the victim can go see a doctor, but with cyber violence, there is no cure,” says Jeon Min-su, a cyber crime investigator with the Seoul Metropolitan Police Agency.

K-pop singer Koo Hara was found dead in her home on Sunday and the police found a handwritten note despairing about her life. She had been subjected to vicious attacks online about her relationships with men, local media said.

Koo had spoken out against cyber bullying. She was found unconscious at her home in May and hospitalized, and a month after the incident she said she was suffering from depression and vowed to fight malicious online comment.

Koo was friends with the K-pop star Sulli, who was found dead in October, who was also outspoken against cyber bullying.

The Korean pop music world is popular across Asia but has a dark underbelly. Earlier this year, several male K-pop stars and one of the industry’s biggest producers were questioned by police in connection with illegal gambling and prostitution.

Kwon Young-chan, comedian-turned-counsellor who has himself been a victim of online violence, said stars have little recourse when they come under attack and it is almost impossible to avoid rumors and personal attacks.

“When the perpetrators write vicious comments, they first begin with a ‘light tap’ and the scale of cyber bullying then intensifies to a ‘punch’”, he said in an interview.

The rumors and personal attacks online make their way into the stars’ personal lives, Kwon said.

Both Sulli and Koo had been with girl bands and later broke out on their own, which made them more vulnerable, Kwon said.