I have been trying to research piracy in the Mediterranean for years. For several hundred years ending around 1840 the Algerian or Barbary pirates were a major scourge for the whole region, often challenging the major maritime powers and winning. It is reasonable to assume that these pirates left genes behind. They were not boy scouts, they were robbers, killers and presumably rapists too.
Now if you look at the stark poverty of the people in those 1877 photos and the environment surrounding them you realise that these people were at the mercy of whoever had a musket or a sword. Obviously I want to believe that my ancestors were proud warriors who succesfully fought off all invaders etc, but look at those photos! They tell a story!