You can find various tidbits about Pirates here.  My favorite is the whole notion of a ‘plank’ to walk:

Few (if any) pirate ships ever used “the plank.” When pirates took over a ship, they usually let the captured crewmembers choose between joining the pirate crew or jumping overboard. Why go to all the trouble of setting up a plank to walk off? As historian Hugh Rankin put it: “The formality of a plank seems a bit absurd when it was so much easier just to toss a prisoner overboard.”

What so called Historian Hugh Rankin doesn’t take into account is that everything about great piracy is purley a formality.  From looting and murdering to the clothes they wear.

Completely formal.  Just like the Vikings.