It's the word "cyber", which is essentially an indicator for "Please ignore me, I know nothing about this subject" to anyone other than mainstream news media. If it was called online bullying, it'd be a different story.
Why does it need to be called "anything bullying"? It seems to me that for anyone who's been bullied, or who hasn't but has seen what it does to someone who is, the noun stands quite well on its own.
