Overwatch bans behavior, not code
An Overwatch reviewer cannot see your software. They watch a demo: where the crosshair goes on Mirage, how you enter B on Inferno, whether you react to someone behind a wall on Dust2. So the key is not hardware but manner. DMA leaves nothing on your system, but a hard snap or a prefire at an empty corner still gives you away. Play like a person with good positioning and good instincts.
