If someone became extremely risk taking after a traumatic event, putting their life at stake at several occasions, it's not unreasonable to believe that - at least in some countries - the person would be forced to undergo a psychiatric evaluation, possibly through a temporary involuntary commitment
one line that is crossed is putting others at risk or pulling them into their actions. I can't think of many scenarios where I'd support involuntary commitment when it was just the individual and their actions.
