I know this sounds typical but if they killed themselves out of academic frustration, I blame the parents. Too often do you see parents pushing their kids too far. They force their kids to study and get good grades with intimidation. Not everyone is going to get A's in every class, everyone is not equally intelligent or good at school (two seperate skills, in my opinion.) I was lucky that my parents understood that kids shouldn't be forced into anything but rather allowed to develop and learn on their own. A little encouragment or support is essential though.