Carnival might be sued for dockage fees, but does not own the docks. Very limited liabilities
“Accessory after the fact” is a very real thing in US jurisprudence and that means if Carnival enjoys the use of property that they KNOW was stolen then they are just as responsible and liable as the thieves themselves.
How do US courts have the authority to sit in judgement on activities that happen outside US borders? Where does their jurisdiction end?