Realistically, you won't because of the transaction costs. Fuzzing doesn't add complexity, it sacrifices precision in favor of robustness. If your trading strategy depends on millisecond timing, it's too fragile for principal-agent applications.

>Then I’ll settle over the counter, directly with my counterparties, and disintermediate your marketplace

Not if that is made illegal.

>those looking to introduce complexity to solve a non-issue

Because HFT is not a huge complexity in itself?

> Not if that is made illegal

That would be a massive change to the American securities markets. Enough so that it might destroy them. “You can buy or sell your securities at competing venues” is a basic tent of finance.

Your suggestion is to make it illegal to sell a security at a specific price?