maritime law is some tricky stuff- and disallows things you'd think obvious when it comes to defense.
an logistics outfit who regularly sailed around the horn of Africa was trying to hire guys of my ilk (at the time) to provide security against pirates... their intended tactics were highly illegal and so was the weaponry... and if there was conflict 'we' would have been on our own insofar as legally- but the pay was off the charts high compared to any other private defense contractor stuff- and this was when Afghanistan and Iraq were in full swing- and you were only onboard those vessels for a brief portion of their passing. If i recall what happened clearly, they ended up hiring a russian outfit... the penalty for error was too much for American guys to do it- engaging pirates wasn't the problem.. facing int'l maritime law after the fact, was.