I Can Team Without Even Knowing It

I ran into Pyramid room in Ice Caves to find three people all fighting. I chase after the closest player, he tells me over voip that I'm an asshole for teaming. He gets away behind a door and I run into another two players fighting. I chase the nearest player. He tells me he's reporting me for teaming. I lose him behind another door. Another player attacks me from behind so I chase him. He puts me down like a dog and then calls me a "teaming dickhead." Man, I just want to play the game.