Given their level of planning, nature of their blunders, and their dogged avoidance of any kind of analysis or reflection, I think we might have to conclude they are pretty close to the dullest tacks in the box, or on edge of mental incompetence. If insanity be reason enough to deflect guilt, then it may be hard to condemn these fellows for their almost sociopathic failure to consider their own safety or that of others.