"A ship in harbor is safe, but that is not what ships are built for." We've all heard the quote. Inspiring though John Shedd's sentiment may be, it's not all true. Sometimes a ship in harbor isn't safe, and neither are its passengers.
There are cruise ports around the world that should be known as places where there's a much higher than average chance of being overpowered: stolen from, hurt, kidnapped, or killed.