Young people are anonymously bullying and trolling themselves online in what some are calling cyber self-harm. Why?

Internet trolling is on the increase, according to recent reports. When people are bombarded with abuse and threats on social networking sites the common assumption is that a stranger is doing it, but it's not always the case.

Some people do it to themselves.

It's known as self-trolling or self-cyberbullying and some charities and social media experts say it is part of another emerging problem they are calling cyber or digital self-harm. Read the article here.