After years we now believe, thanks to all the scientific world discoveries information shared with the world that Orcas are smart, very smart.
I submit that in this particular area of the world/oceans these Orcas, perhaps even a pod or more, have been strongly offended by humans in some way and over the last couple of years are now making their objections known. Perhaps suspicious boaters have injured them, killed an orca (young or a leader) either intentionally or not, humans have strongly upset them and they want us to know. Perhaps it continues to occur and they want us to stop.
I believe the authorities in this area need to investigate and figure out if something humans are doing have set them off and stop it from happening before more innocent boaters pay the price of those without conscious.