I've also been thinking about this story a lot:
http://forums.psychcentral.com/showthread.php?t=233966
I can't wrap my head around why people act this way. Also a little upset that my son was apparently treated this way too. Then we had a "discussion" this evening (I ended it before it became an argument) about the whole bullying thing. My son argues that there are lots of bullies in the world and the only way to handle them is to beat the stuffing out of them. I think bullies are few, and there are ways of dealing with them short of physical violence.