Most likely they lack the understanding. I remember in the Far Cry 3 forum, people were complaining about negative mouse accel, and one of the DEVELOPERS asked what negative mouse acceleration was... My god... -_-
It seriously isn't that fucking hard to have a mouse aim without all that stupid accel shit, because really, the DEFAULT CODE for mouse input is WITHOUT all of that crap! They just decide to add that in for some dumb reason, or if it's a console port, they leave the negative accel code from joystick settings and it gets inherited by the PC due to laziness. GGNORE