I think you're right on both... adding noise would reduce the accuracy of the fingerprint, but boarder biases would continue to be detectable. For instance i'm

I think you're right on both... adding noise would reduce the accuracy of the fingerprint, but boarder biases would continue to be detectable. For instance i'm aware of some quite significant biases between firefox and chrome in antialiasing fillRect() for subipixel values as the dimensions drop bellow 1x1 pixel that only a distracting amount of noise would be able to conceal for one sample. I know that's already detectable via the useragent string, but I suspect those who are focused on collecting those biases will find strong ones for other data points.