Maybe a madman (including women) isn't as "very rare" as Mark states in his original post, as seen in the links above. I thought he was referring to events like Columbine, the sniper in the above link, and alike. Therefore, if such occurrences are less rare than presented, it looks like the best planning and preparations involve a gun. Frankly, my Aikido or other martial arts waza training isn't going to stop a bullet. It may take a gun a way in the right circumstance or situation. But, we never know if that is the circumstances or situations we will be in.