A friend of mine, also an F.O. as gentle as a lamb, but very large in stature,
got up out of his seat, picked up the crash axe and slowly and impressively strolled down the aisle with it in his hand.
The cabin went absolutely silent, and the troublemakers retook there seats and behaved beautifully from then on.
Said technique worked well in the neighborhood bar I frequented in my teens years ago, except it was a baseball bat as opposed to a crash axe. It was kept in full view but out of reach of the patrons, and everyone knew that the keeper knew how to use it.