Are there bullies in the world?

One of the main causes of teen death is suicide. Teens commit suicide because of bullying and other factors. The question I and many others ask : "Why do people bully online?". I think people bully online because it is easier to hide behind a computer than to be a jerk to some one's face.
I personally would stand up for someone who is being bullied. I think most people would would but there are those people who do not like confrontation and also do not like to put themselves out there even though they know it is wrong. I would stand up for people being bullied because I have been bullied. It is not fun at all. I have blond hair and most people think I am dumb because of it. So they would say stuff like I am incompetent and slow, which is completely inaccurate.
If I stood up for somebody it would be to give them the support and confidence that I never had. However, I think that is is okay that I never had that support because I am the type of person to hold everything in until I explode. This is why I am the way I am.