Though I doubt anyone would want to actually give someone who did something like this such positive encouragement as writing a biography of that person. Most of the people who do this kind of stuff are all the same, anyways. They were social outcasts who probably were bullied through school, they had uncaring parents and/or lived in a dysfunctional family. Just a whole bunch of negative factors that end up culminating into a severe mental illness and a desire to "get back" at the people who they percieved as wronging them in some way. Shooters generally don't pick and choose though. Maybe the class they go into, but once in there they just fire into the mass. You could try reasoning with them, but most likely you'd just end up dieing like a coward. Personally I'd just try to beat the [cabbage] out of them with a chair or something. If I'm going to die anyways might as well go down fighting. EDIT: Added some more useless details.