Before I start I want to say that I was a lifelong victim of bullying, I suffered from it in every school I went to, and even outside school. So if you get offended or anything, well, I didn't mean to do it. I'm talking from experience here.
Bullying is by far not a good thing. The deliberate detriment and abuse of others is one of the worst examples humanity has to offer. There is no denying this really. But, and this is where it gets interesting, there is an upside to bullying. That's right folks, I actually said that.
You see, bullying pushes people to better themselves.
You may know that a lot of celebrities say that they were bullied. Oddly enough a lot of models and pretty girls from Hollywood say the same. That they were bullied as kids, especially for the way they looked. This causes most people to think "What? Someone as pretty as you?" and well these people probably were not always pretty. Someone pointing out your flaws can drive you to improve upon them.
Look at Mini-Zangief (whose name has long since been forgotten) who stood up for himself when no one else would, and beat the crap out of the kid who bullied him and went viral. That is an example of what pushing someone to their limits can accomplish. Though I think he expressed himself in the wrong way. Violence isn't the answer to bullying.
Being awesome is.
My best friend, Jessica, was almost destroyed by bullying. She managed to pick herself up though, and I have heard her say that she wants to be awesome because she wants to throw it in the face of everyone who hurt her. She wants to do what they said she never could. Even our teachers called her a failure and said she'd never amount to anything. She used it as fuel, and by God is she awesome.
Just be there for bullied kids. Listen to what they have to say, and help them obtain true revenge. Not by beating the crap out of the bullies, but by becoming better than they could ever hope to be.
Bullying is wrong, but there are some people, that for whatever reason, will always be bullies, and nothing will change that. Even though I was a victim of bullying, I myself bullied other kids at one time or another. There are kids who can't help it, as well as some that are just malicious little shits.
Bullying is two sides of the same coin. Help the victim better themselves, but don't neglect to understand why it all happened in the first place. Usually a bully actually has worse problems than the people they hurt to make themselves feel better.