I have been wondering this for a while. In the first MOH games this didn't happen and it was very easy to aim and shoot them. It'd be nice to aim and have our aiming move, especially using a sniper rifle or something. The farther you are from an enemy the more the aim shakes, or at least that's the way I think it should be.
Having the aim move while you walk/run/ etc. would stop llamas in mulitplayer and would make it realistic.. it would MAKE you have to stop and aim... Thats a brilliant idea