I actually see selling repro posters as a feature for us collectors. Known and marked repros are low cost alternatives for the casual amateur who just wants to tape a poster to his wall.
The way I see it, this helps keep the prices down and the long term supply up on legitimate posters. Good for collectors, maybe not so good for dealers.
What is a problem is repros that are not identified as such or ar listed as originals. Those would not go away with a ban and would probably increase.
