Anyone cant stick stirr without pulling negative g's also. 
If you limit stick movements further, game will be unplayable. How is the game supposed to know if you are trying to keep the plane from stalling on top of a rope and applying rapid rudder movements and/or elevators/aelorons as opposed to 'pissing someone off' on my six at 200 who I'm not straightening out for, for an easy kill? 
Who said I can't be hard on the controls? I'll throw my stick how i fancy, much like the pilots in WW2 did.
My guess is that stick stirring is here to stay. If it means expending more ammo, deal with it. 
But.. thts just my 2 cents
That is why I said ... "if the results of such moves can be realized by the code and then stop you from doing it is what is needed" ... operative word is "if".
Hey ... stick stir all you want ... like most said, 99% of the time the stick-stirrer does end up dieing ... and looking like a fool at the same time.
Personally, I would much prefer to try some sort of aerial reversal/overshoot and if I died as a result, then I can review the film and see what exactly went wrong, and conversely, if I did manage to pull off the reversal/overshoot I can review the film to make sure I understand what I did so I can do it again.
Stick stirring simple shouts out ... "zOMG, I am screwed and I really have no clue as to how I can possibly reverse this situation ... so I will jerk my plane in every possible direction, in rapid succession, because there is no virtual physical penalty and just maybe I can outrun him."
Living and/or dieing as a result of stick stirring ... nothing is really learned that could help in the future.