It is a notion worth consideration. As always we are chasing "numerators in search of denominators". Specifically as regards clusters. The moniker "Suicide headaches" was attached long before psychotropic meds were handed out like candy. Cluster headache suffers have all life's usual burdens to wrangle while dealing with lost opportunities, wrecked relationships and seething pain. Removing the drugs from the picture, the disease burden of clusters is pretty high...enough to evoke consideration of self destruction. The use of some of these meds may constitute a sort of tipping point but the jury is out on the magnitude of their contribution. In the shooters situation these folks were already predisposed to some type or another of self destructive behavior or demon which led to the intrusion of mental health "care". Unfortunately our current system is ill equipped to provide proper evaluation and treatment of so many mental health issues. Add that to the fact many resist treatment, play with their meds, add other substances of abuse to the mix and have piss poor support systems. You have a recipe for disaster. All they need to do next is practice on a first person shooter game and then go out an reek havoc on peoples lives. If you consider the extremely high proportion of individuals on these meds and the very small number of incidents coupled with confounding factors it would be hard to draw a straight line. That said if you have classic clusters (episodic or chronic) there is no need for these mind pollutants. The treatments that appear to be most effective, D3 regimen, O2 and indoleamine hallucinogens do not have these issues in an otherwise mentally well individual. Don't you owe it to yourself to try what decades of real life experience endorses?.