When me and my brother first started playing ARK we spawned in the Redwoods on the Center by the shore and we saw one of these guys just walking around. We had nothing so we didn't have anything to lose, so we walked up to him. I guess either I wasn't close enough to aggro him, and maybe my brother wasn't either so I kept walking around and my brother was just chillin with him and all of a sudden he punches my brother into next week!
First time I tried PvP I saw a guy with a monkey on his shoulder while he was running on this Animal's shoulder. I tried to run but one was throwing poop while the other was punching me. It left me traumatized.