It's hard to continue this conversation in good faith without pointing out that you literally have no idea what you're talking about. You don't know what HFT firms or what market making actually is, yet you don't mind throwing out outrageous accusations of fraud and illegal activities with zero evidence to back it up.
Your entire argument is "I don't know what they do, and they make money in finance, so they must be doing it illegally." The burden is on you to provide evidence to back up your claim. That's how things work. I could claim that HN user rgifford is the Zodiac Killer, and my evidence is "I don't know him but if you rearrange some subset of the letters of words he's typed in the past, they spell out 'I am the Zodiac Killer'". Whether you realize it or not, your reasoning is that specious at best.
> The market for consumer electronics hasn't fundamentally threatened the stability of the US government every decade for the past 5 decades.
Nothing HFT has ever done has come within even 0.000001% to threatening the stability of the US government. Period.
> Renaissance Technologies Medallion fund may as well be an insider trading scheme for all the public can tell.
Again, claims require evidence. You need to provide that evidence. But more importantly, the fact that you compare RenTech's Medallion Fund to HFT again demonstrates your complete ignorance on the topic. The Medallion Fund isn't powered by high frequency trading. It started decades before HFT ever existed.
> Do HFTs issue or purchase billions of dollars of debt with the express goal of market liquidity? No? So why do you use the term "providing liquidity?" You know "providing liquidity" isn't the same thing as "frenetically purchasing and selling derivatives," right?
You don't know what providing liquidity means. When you place an order to buy or sell 100 shares of MSFT in the market, who is taking the other side of your order? The vast majority of the time, it's an HFT firm.
> If these funds didn't exist, I've seen no compelling evidence markets would so much as hiccup.
I'm sure if you took all of the grease out of your car engine, it would continue to operate without a hiccup.
> I've seen plenty of compelling evidence that much of financial services in this country are a net drain on its productive capacity.
Another false comparison. HFT is not a standard "financial service" that is provided to consumers.
> We'll have to agree to disagree [...] Time will tell!
Flat earthers also ignore reality and disagree, but that doesn't make their perspective equally as valid as those who look at pictures of the earth and conclude it's spherical. Time has already told us, but whether or not you want to look at facts or educate yourself on even the basics of what you think you're talking about is a different question.
Almost every sentence you said in your post contained some flat out false or wrong statements. Your unfounded arrogance is matched only by your ignorance on this topic. You have not made a single concrete or factual point about how HFT might be fraudulent, yet you seem to hold this worldview with the same conviction that the sun rises in the east.