Active aero/active vortex generator?

[Iceracer33]

So, drag vs downforce on race cars is the equation.
We all know vg's will help airplanes from stalling by keeping the air attached past the point of stall. At stall the air has no (?) major drag? (This is a question).
So let's say your race car has a flat bottom, front splitter and a rear diffuser, typical right? Let's take the rear diffuser and make it ramp up past stall (reduce downforce and drag because it is past stall) and then activate vg's in a braking zone which deploy in front of the rear diffuser (yes, under the car)... the air will then attach and create greater downforce (another question)?
Active aero is not new but most cars don't play with stall and vortex generators. Good idea, bad idea... tell me what you think.

My opinion: I believe if you put your diffuser at stall you'll achieve less drag at high speed and then activate the "active vortex generators" to create greater downforce in braking zones, this to me makes sense.
Please don't get lost in how to make them (that's not hard) I am more interested in the principle of it working or not. Balance would be an issue too, yes I know... will it work in principal?

 

[CWatters]

activate vg's in a braking zone

Most rules ban aerodynamic devices that can be moved by the driver.

Some time ago in F1 the McLaren team found a way around the rule. They used an air duct called the F-Duct/RW80 to stall/un-stall the rear wing. The air flow in the duct was controlled by the driver sticking his knee into the duct to block the flow...

More here..
http://www.formula1-dictionary.net/f_duct.html