I was playing siege and this dude just stood on the edge of the map shooting his pistol at the building on the map border and he was just hitting headshots. I was instantly confused about how he did that and watched the kill cam and he was doing just that. Then I started spectating my teammates and they were hitting him but he wasn't dying. Usually, I'm sceptical about hackers, but the next round he did the same thing where he just shot his pistol at the building hitting headshots again. So I reported him for cheating and after the game, I couldn't connect to the servers and I haven't been able to since.