"Audiophile" is all you need to know about it.
It's a curious market; it's set up to not just allow but indeed encourage self delusion, and strictly discourages anything that might break the lie -- like double-blind testing. I guess, since the customers are generally fiendishly wealthy, one might find a certain justice in conning themletting them con themselves, but I wouldn't exactly call that a moral imperative...
Tim