I remember when COD MW2 came out I got it on PC and jumped on the multiplayer the day the game came out. I ran into a guy wallhacking in my first game. The killcam showed him tracking me perfectly on the other side of a wall, his aim following me perfectly when he could not see me. This is the day the game came out and my first game. Then you'd run into gamers you thought were cheating, but turns out they were just inhumanly quick. You could spot the hackers easy, but then you'd get the legit freaks who could headshot you the moment you peeked one pixel around a corner.