It was put in to discourage stick-stirring (rapid movement of the sstick to cause the plane to flip flop due to inherent lag in ALL internet connections). It is my understanding that this was very common in some other sim (not sure if it was WB or AW).
The best way to avoid it is two things: don't move your controls too fast (easier said than done in some situations) and increase the damping on the joystick setup screen.
Hope this helps.
