So, if you get bullied and harassed constantly and are suffering from sleep loss, stress, etc, you need to go to a doctor just because it's from a video-game?
Just because it's a videogame DOES NOT make it any less relevant. It has a community, and if I wished, I could easily counter with "Facebook is just a website, ask.fm is a website", etc etc. That doesn't matter. Cyber-bullying STILL exists and is a huge problem.
We have a community, along with a video-game. They're not getting bullied by virtual characters, they're getting bullied and attacked by actual people.