Yeah Mike, I posted to that earlier. And Ptarmy.... I haven't researched all of the people on your list, so I am stepping out on the limb of speculation here, but it seems to me that some were bullied, and then grew up to be bullies. I was bullied big time as a child, in fact I was duct taped to a freaking tree in front of high school. I know bullies. What I am trying to say is that regardless of what has happened in the past, what is happening now, today, in the schools of here and now, there seems to be much more violent bullying going on. Now, it may very well be that we are just hearing more of it, thanks to the wonders of the innernets, but I do wonder, if it might have to do with the lack of engagement that occurs in a lot of family situations....not everyone, but the rest of everyone.
I would love for some parents to chime in here, to share. I don't have any my own, so I am just speculating.
Again, I am referencing children as bullies, whose actions cause other children to cause harm to themselves, up to, and including suicide. I already know that grown-ups can be hateful.