I would expect psychopathic people to have a history of psychotropic drugs... It doesn't necessarily mean the drugs are a cause of their extreme behavior.
If you ask me, we're pretty lucky that there aren't more nutjobs loose in this world. Global population has doubled in the last 40 years... makes sense that we'd have at least double the amount of freakazoids running around.
Good point. Kinda like saying everytime I put on a rain coat, my dogs refuse to go outside. Has nothing to do with my rain coat, but everything to do with the rain!