There was a guy I invited who did that. No message no nothing. It turns out that it was his first KFRaid so he was a bit excited to say in the least. He just starting shooting EVERYTHING while running around like a Republican trying to find the facts. We were all just TRYING to account for his blunders and I messaged him more than several times about needing a mic and or at least LISTENING to us. Of course he could hear our advice and recommendations but he just continued to run around and just mindlessly shoot all but us. Insta-boot with a kind message.