Rum, that can easily become a weapon of mass destruction. Quite humane in its character, for its destructive effect is very time limited. The only exception are the brief periods when Methanol is used. That will easily bring down a whole battalion just like that. If your group dines too much Rum, it will very quickly lead to a total loss of self-control and can even lead to a short-term memory loss. That is often induced deliberately (and hypochondriacally), espectially in the morning. You have to treat it carefully and with moderation, but as for how specifically... I don't even know that myself.