A machine-learned system is only as good as its training data, at best. In this case, it was trained on natural-looking images, so results on &quot;unnatural&quot; images will be unpredictable&#x2F;random&#x2F;wrong.<p>One way to fix this would be to provide &quot;bug bounty&quot;-style rewards for producing images that makes the system deviate significantly from mechanical turk workers performing the same task. I wouldn&#x27;t be surprised to see google&#x2F;fb etc starting such programs in the near future, as their ML systems reach maturity.