This being the Real World means pure free markets are impossible and in fact dishonesty and chincanery can utterly distort markets, leading to all sorts of perverse outcomes.
Ironically, for a free market to operate well, you must have reasonable constraints on market participants.
This is incorrect. Free markets rely on enforcement of contracts, property rights, and prohibitions on force and fraud. This requires a government.
For example, stealing from your neighbor is not a free market operation. Neither is delivering someone a Ford when you sold it as a Ferrari.
> [in free markets,] price and demand are set by the market, free of any government interference
I said nothing about contract enforcement, property rights or prohibitions on force or fraud.
> pure free markets are impossible and in fact dishonesty and chincanery can utterly distort markets
My point stands. Dishonesty and chicanery are not condoned by the free market, because they're fraud and theft.