There are many but we don't hear about them all, and some commit suicide with out anyone even knowing why, they are ashamed to even mention it to anyone, it is very sad but the biggest thing about bullying is to kill ones self esteem and it only happens to those with low self esteem because they allow people to get into their heads and rearrange their thoughts about their own self worth and self value, those that are of strong will and a high self esteem almost never have that problem. Those that bully have a self image problem also. A well rounded person would not bully. There have been adult bullys' on this site so a bully does not have to be a child or a young adult hope this helps in a small way.
