They were orca hooligans.
Most of the 15 were male juveniles and teens, the "most curious and exploratory" of an orca population, suggesting that what started as playful head-bumping on boat rudders has escalated as the animals have grown larger. The team notes that this rudder-bumping behavior was observed around 2017, but the interactions didn't result in any boat damage. Now that the orcas are larger, their game has become a lot more powerful.
And no orca over the age of 25 – when males are fully grown – has been seen participating in the tomfoolery. Scientists suspect younger orcas have seen older siblings playing with their rudder 'toys' and then copied. (Some females have been spotted, but they're most likely there just to babysit the kids.)
Was there an article that came out about them being a safe haven for pedophiles? Cuz the US has a shit ton of pedophiles, one of them is our president.