Earlier quoted context omitted.
Fees on trading would not meaningfully discourage high frequency trading and would just be passed on to buyers and sellers of stock in the form of larger bid/ask spreads.
I think higher spreads would “slow” highest frequency trading. They cross the spread many more times per dollar than regular investors to it costs them more. High frequency trading only works inasmuch as transaction costs are low, at least that’s my understanding.
If I understand your thesis correctly, you want to decrease liquidity in order to reduce the speed at which high frequency trading can be executed?
I'm not following your point about transaction costs - or do you mean that you'd limit HFT by reducing liquidity, which in turn would reduce their volume, reducing their trade discounts?