Not quite the color balance, but how anyone can assert the brain is hard to exploit is beyond me.
[1] it's this technique - links is probably nsfw: https://richardwiseman.wordpress.com/2010/09/07/naked-women-... - I don't remember the name of the subreddit.
No it's not, just ask any advertiser.
> You can't trick it into thinking an image is pornographic just by changing the color balance.
If the only data someone has about an image is its colour balance and you asked them to classify which they think are pornographic, then yes you can.
It's a pretty stupid idea to impose such limitations though, on humans or ANNs. Even if you did only care about colour balance, you don't need an ANN to tell you that; just scale the image down to 1 pixel x 1 pixel, then look at its colour.
One of the great things about humans is that they can consider the context of a remark, although apparently this is not universal.
As others have pointed out, the complete opposite is true.