Full-time bullies should be removed from the schooling environment so that they can get help and psychological assessment. I'm not talking about petty teasing here, which everyone does at some point in school. I'm talking about the extreme cases.
People are not driven to suicide for no reason. It is not easy to come to that conclusion or to commit the act. The amount of suffering must have been overwhelming in order for it to override the will to live and survive. The other thing I'm wondering though is where are the coping resources of these children? Most suicides happen because suffering outweighs resources of support. Were the parents oblivious or unhelpful? Was the school turning a blind eye to pleas for help?
I was bullied pretty bad in grade 8. I'm over it now, but it mostly left a bitter taste in my mouth about the education system. I was bullied openly and in front of teachers. In fact, some teachers even took part. I'd imagine that in cases where bullying drives a person to suicide, you are looking at schools with teachers that are overworked and thus can't have time to care, they don't care or don't know how to adequately deal with it, or they are actively taking part.
Children should not be slipping through the cracks and dying because of bullying in the year 2010. Zero tolerance should mean zero tolerance. Remove the bullies, not the victims.