Strange Killer Whale Behavior????

There has been some strange behavior amongst Orcas that is being reported on the news lately where experts can’t explain what is going on. One news reporting is groups of killer whales attacking ships and terrorizing people. Another recently reported 30 Orcas on the coast of Monterey Bay splashing around in large groups. The experts say they have never seen this behavior before and can’t explain it. I know marine life is dwindling and there are other external factors that are affecting and imposing on these animal’s habitat. It may seem like they are trying to gain attention but was wondering what the message may be behind this?