I think conflating pirates and governmental invasion misses the point. If pirates attack, you can shoot them (and modern-day pirates, at least, seem easily det

I think conflating pirates and governmental invasion misses the point. If pirates attack, you can shoot them (and modern-day pirates, at least, seem easily deterred by bigger guns). If a state attacks, such as what happened with Tonga, you're likely to be attacked by other states if you successfully defend yourself.