Except that even with camber plates, you end up with 3 degrees or more negative. So your car is then ONLY useful for drift, and not practical at all for regular street use. All for a bit extra steering angle. Which could have been done by simply shortening the steering knuckles. Which has been done before so it's proven to work well.
Oh and I might add to things that much negative camber would probably make the car difficult to control in a drift, since the front wheels are your only contact patch. No bueno. Hellaflush stanced status FTL.