Being a person that gets cyber-bullied regularly, I've learned from experience, that to counter bullies, you either just ignore them, or you fight back.
The big tip, is to never take anything they say seriously. Legit, if they say anything, just respond as if they never said it, or fight back, or dismiss that and move on. Like come on, it's just a retard on the internet. Don't give them attention.
{edit: then again that's easier said than done}
There has been a case where I couldn't do anything against a cyberbully.
I was playing valve comp, and I was up against a Greek cheater.
He kept using death threats against me. And he'd always kill me.
Sadly I couldn't leave the game, 'cause I didn't want a 30 day cooldown, and I couldn't use "hud_saytext_time 0" for some reason, thus I couldn't disable text chat. So I had to stand there and get killed continuously. I tried to fight back, but struggled to text, since I didn't have the game play for itself, just like the cheater.
Most of the time I told him to get a life and stop cheating on a 13 year-old video-game.
I also remember telling him that the game is older than him.
That was smart.
r-right g-guys?
guys?
pls give me attention.