I had noticed on a number of occasions that my muskets seemed to be vanishing from the stockpile. I decided that I must be miscounting or some colonist or other was picking them up and hiding them. Wrong. I caught the evil aliens who were there to 'trade' blithely helping themselves. Pistols and muskets gone from my stockpile before my very eyes. The shameless pack of thieves could not even be punished for their larcenous behavior. Beware of these foreign types.