I read an account of exactly that happening to the natives in my country 200 years ago. A group paddled up the river in their canoe and the local tribesmen who were clearly more powerful taunted them. But the natives in the canoe had newly discovered guns and shot the taunters until they were "tired of man-killing" and went home. It seemed to be purely hunting humans for fun. And yes, it was horrible, that was part of a wave of wars that decimates the whole country and cost them their sovereignty.