Are these superyachts built with defence capabilities? If I were a billionaire I'd be building these to suit my life in some potential Waterworld future.
In general, arming a boat is a huge nuisance if you are going to travel between countries. You might have a fantastic super yacht, but it’s like every country thinks they can make their own rules and tell you what you can and can’t do in their territory. Crazy.
No, that would be too limiting. Instead they'll just meet their armed PMSC escorts in international waters.
I have heard that some are equipped with defenses like that but those were more for heads of state.
I'm sure that the rules are different for important people. But in general, no armed foreign boat is allowed in any port in the world unless it is a military vessel with an agreement already in place.
It's completely legal to summarily execute pirates in most of the world.