Three females attacked small boats for years with impunity. For fun most likely. Now they got bored of just bumping and breaking rudders. Why? They are intellig

Three females attacked small boats for years with impunity. For fun most likely. Now they got bored of just bumping and breaking rudders. Why? They are intelligent, they have a lot of free time, and not that many toys to play with. And they are top predators, nothing to fear. They will be doing it till hunted down or punished somehow. Not that I'm voting for it, but without lessons of respect they will never unlearn their bad habits. It's just a matter of time till they kill someone, or start killing intentionally.