Mouse or Keyboard to aim?

[ExodusS]

Nah, in fact it's a really interesting thread, aiming is not only from the mouse, you can just aim an opponent and follow his moves with your own moves, adjusting a bit your aim with the mouse. On flap maps, headshots are easier like this, you aim the head-line then you move until you saw a head on your red dot.

Anyway, it's something any experienced players do non-intentionally.