This is not good news I just saw the leak, and it is exactly like the last one which was true.

I came here to post an bring it to your attention.

But now I just want to ask, would a captcha system or randomised pixels be impossible to beat? Are there realistic ways to get around it?

Irrespectively, I would not be suprised if supercell dev's are lurking here. SO ANY FIXES would most likely need to be kept to the developers somehow.