Here's another spin on ethics:
I'm sure a lot of 'unethical' folks looked at books in bookstores, and then went out and ordered them online at Amazon.com for 30% - 40% off. Amazon.com got bigger and wealthier. It survived the .com bubble. Today, I don't even go to bookstores anymore. I really can even flip though pages of a book at amazon.com. I also use a kindle for non reference books. I don't even have the time, so most of my shopping is really at amazon. (even candy).
As far as CDs went, it was even at the onset, a lot better to get stuff from amazon. I could actually listen to CDs (or snippets of music) online to get a taste of the music before I went out and bought the CD. With music stores, I couldn't. Or definitely couldn't to the wide variety of songs before the salesman gave you a look.
Here's another flip side question:
Is it unethical to go to a website to look at reviews of a product (say at amazon.com) and then buy it at a different website?
I think a lot of the questions of ethics have to do with us putting a face on a store. With smaller hifi stores, we associate them with a few salesman, that we build a working relationship with. Us not buying makes us feel bad because we feel bad for the person we 'cheated'.
With a large firm like amazon, it's kind of faceless, and I guess that's where brand loyalty comes in. You're buying from them because of service, and dependability (and also price), not becuase it's ethical/unethical to buy from them.
I'm guessing we don't think of ethics when going to amazon's website, looking at reviews, and then buying somewhere else because we don't put a face on amazon. We don't think of the countless people who make it possible to have that website going in the first place.
Was it the unethical people that made amazon successful?
Now, HiFi is a totally different beast. I don't see a way to replicate what we did with books (sensory information) with the high end electronics (very subjective audio information).
Although, here's a different business model for high end electronics websites:
You order a bunch of stuff and it comes home to you. (you've got on the phone reps). You listen to it for a a week or so, and send it all back. You then order what you liked. It's more realistic than listening at the hifi store in any case, since a lot of it has to do with the acoustics of your room.
I'm guessing electronics, specially speakers are too bulky a product, and the number of audiophiles too little to make it a worthy proposition.