There is a mod out there that does this, and its be stated before, By Developers, That if someone made a mod for it there not going to make it a part of the game... If that was not the intent of what was posted by the dev's then I apologize for the misconception. However, with that being said, It would be nice to have my avatar/player unit be still...
I dont like the fact that there are times when you dont want to move... so there is less a chance that people will see you .... then your swatting invisible flys, and wiping your forehead... Im pretty sure a trained soldier will ignore a fly on him while the enemy is close, so as to not alert them to his presence (being they are in concealment).
Either way it is a trivial, nonsense, Fluff, animation, that servers No purpose, then just to have some ambient movement from AI. But all Player units should be Complete Exempt from All Idle Animations!!