I will admit to doing this once. The guy was not helpful the whole mission and then killed me and my friends intentionally as we were boarding the shuttle. Not with an air strike or something like that, with his weapon, one at a time. I think he deserved it.
I joined my first game last night, joined some random planet which had one guy on it. The guy finished the mission like a minute after I landed, and was waiting for extraction when I ran over and tried to salute him as I'd learned in tutorial. But I accidentally threw a grenade right at him, killing him. I got kicked. I deserved it.
I died and it bugged where I couldn't get dropped back in. They spent 17 minutes completing the missions and then kicked me right when the ship landed.
Bro we spent 40 minutes getting almost all the samples on helldive and struggled like fuck to extract. We all got on the ship and this one idiot shot us all dropped the samples he had and jumped on board.