Using a sniper rifle while running the game on 3 monitors leads to major advantages in multiplayer:
The zoomed area is not limited to the scope but to all three screens.
When playing with 3 monitors you can see a lot more while using rifle scopes or binoculars. See attached screenshots for clarification.
I know that this "you can see more" also applies to general gameplay, but it feels wrong if I can see so much more while sniping. {F21384}