I suppose you could cause camber problems by going to aftermarket rims. However, I think that would require that the overall diameter of your wheel/tire assembly be smaller than stock, thus causing your wheels to tilt outward slightly at the bottom. Camber is basically the tilt of the tire against the road. If you have "negative" camber, you will wear off the insides of your tires fast because that part of the tire has increased pressure on it due to the tire not sitting flush against the road.
On any account, if you get a good computerized alignment, they can fix it...kinda. Our cars have adjustable camber on the front 2 wheels. The camber on the rear 2 wheels is not adjustable, however.