If I could find a way to send some sort of emf pulse through Bitmain's entire network, and completely ruin them I would. This would include all of their equipment and wallets where they store all of their coins and backups. Poof, in a blink of an eye, Bitmain lays in ruins. How great would that be people? They are the biggest threat to bitcoin right now.
Detonate a 1 megaton thermonuclear warhead at high altitude over China. Will probably take out most electronic equipment out in far east asia too.
Then just wait 2016 blocks until the next network difficulty change. Might take a while.
Or just join the calls for a PoW change, so that a new mining pool oligarchy can develop. Just buy up CPU, GPU, FGPA stocks quickly and it could be you!
I laughed, Good God I laughed. You get a cookie, Mister.
I understand the angst, OP, but removing that much of the network would have grave consequences on network congestion. And network confidence. Ultimately, it would shake up the dice cuo, but in a bad way.