Two articles from the latest edition of The Triton:
Captain arrested for gun in NY still awaiting trial
Man on trial for party on Savarona
As mentioned here previously, part of our approach to 'self-defense' for the vessel/captain/crew and guests is awareness of the laws in the countries you will visit - and plans for what to do when things go wrong (ala Captain Murphy, that infamous seaman).
Many vessels have been impounded and mariners imprisoned because of the actions of guests (drug and gun offenses seem the majority of the problem areas).
My thanks to The Triton for bringing (and keeping) these stories to light.
Have a Merry Christmas. Feel free to contact me at firstname.lastname@example.org.