Flying the Jolly Roger, a pirate flag, is not illegal in most countries if used for decoration or historical reenactments. However, flying it on a vessel at sea could cause confusion or suspicion, as it historically signified piracy, which is still a serious international crime under maritime law.
Flying the Jolly Roger isn’t illegal by itself — it’s just a pirate flag. The problem comes if you use it to threaten, commit crimes, or impersonate authorities, which can get you in trouble.
No, it is not illegal to fly the Jolly Roger (pirate flag) on private property or clothing. However, flying it on a ship at sea can cause confusion or suspicion, since historically it signaled piracy. So it’s legal, just context matters.