BloodyBaroness
Captain Titsworth
Interesting. Admittedly, I have not studied threat assessment. As an academic though, I would be interested in looking at data and evaluating the samples collected, the way 'violent minded people' is defined, and to what extent age and mental illness are addressed as variables. (my interest, of course, piqued by the events in newtown.)
It's tremendously interesting to study. I spent time at FLETC, now I work part time as a trainer in addition to my normal 8-5 in private protective security. I train law enforcement and private security on threat detection and employee protection with in a corporate environment.
I eat, sleep and breathe ways to anticipate violence and stop it before it starts. There is no perfect science, most of it based on making yourself not present a target. Deterrence is the number one way to do it. Create a path of resistance and threats will start to dissolve. It's all about a realistic approach.
You don't have to go captain insane-o on things. Show a little resistance muscle in the form of guards (armed or not,) security cameras, access control and education for employees then BAM! You have just made yourself a very unattractive target for someone wanting to commit violence. The more places that do that, the less and less mass murder sprees will happen.
Violence is never going away. You have to report things/people you see that are wrong and post a good defense. It will never stop, but you can do a lot to keep it in check.