It depends on how well that person copes with decreased inhibitions. I, personally, have done stupid amounts of benzos and alcohol together (Xanax and vodka being one) and have never been told that I went crazy, or was nasty. I've lost a week, due to taking 500mg of diazepam, in powder form, on a few occasions, but I've never lost my mind. It's down to many psychological and physiological factors, and you won't know until you've done it. Benzos, like alcohol, can turn people into proper dicks. I've never had any sort of episode on benzos alone, and honestly can't imagine going into a rage, after taking them. GABA agonists seem to bring repressed memories and behaviours to the surface, in a pretty extreme way.