Nearly all of this aggro behavior (biting rudders, killing giant sharks, attacking blue whales) is the work of young male orcas, typically two or more of them. Mammalian bachelor groups are capable of damned near any rotten and violent behavior, as they vie for their places in the social hierarchy. Young males are far less concerned with impressing females than with impressing other males, b/c that's where the social traction comes. Stupid pointless stunts, or a bit of the old ultraviolence ... you'll see it at any skate park or shopping mall. Or milk bar.
You forgot to mention young male elephants, that terrorize villages, until an American hunting tourist plugs it and gives the majority of meat to the village that it had been plaguing. After that all the other gang of elephants figure it out and take off back into the bush.