Error: evercookie png. Uncaught SecurityError: Failed to execute 'getImageData' on 'CanvasRenderingContext2D'

[Anton Pilipenko]

I got the error:
Uncaught SecurityError: Failed to execute 'getImageData' on 'CanvasRenderingContext2D': The canvas has been tainted by cross-origin data.
evercookie.js 569

I could fixed it with add img.crossOrigin = "Anonymous"; at https://github.com/md-5/evercookie/blob/master/js/evercookie.js#L543
Is it right? (for example anyone can replace a cookie? ) how can i fix that another way?