How 2 stop cyberbullying:

Simple:

Stop seeing them.
If You meet them in town or school:

Just Ignore them and walk by.

Furthermore:

Block the bullies on every social media account YOU use.

If it takes 100 times to block them, take A 100 Times.

Report it to staff every time he/she harrasses You in Real Life.

Train a Martial Art:

Boxing, Judo, Karate Or Jiu Jitsu.

Or:

KRAV MAGA.

If the Police

( In a Protest Or Demonstration )

hits me?

I Don't retaliate but I do block them.