As a red fish, I don't yet have the power to support the fight against plagiarism through downvotes. Even to fight with other red fish too I feel pressured. Especially to downvote the pope. Their revenge, that's what I'm worried about. Even for red fish, I think they have an aliances. That's why I very rarely use downvotes for an act of plagiarism. It's not that I approve of plagiarism, I'm just a red fish avoiding retaliation.

I'm very agree for Your idea to fight the plagiarism with a voice auction game. It's a good solution. It's almost risk-free.