If you're asking for an example for a cause/effect of cyberbullying, maybe I can help you with that. But if my answer didn't comply on your question, you can always ask me to make another one or ask others.
Cause: A student made a mistake in answering the oral recitation in class. 
Effect: Later that night, most of his/her classmates were having a gossip/chat in Facebook, Twitter or a Gossip Board about the "funny" mistake he/she had made. 
Hope that helps~ :)