Isn't this just basic frontrunning? The scheme works because you know about an order that's going to move the market, and you can exploit it better because you have an HFT infrastructure, but the unfairness is still based on being able to predict orders.<p>I'm genuinely asking, not stating. The problem of being able to front-run block trades is a really old one.<p>(Wow, googling "front-running" is all HFT now.)