Some folks will always take this kind of thing to the extreme. Saying that its untehical or irresponsible to keep corals, fish or other inverts at all. I dont see it that way. Its simular to the radical PETA people who would rather starve a bunch of wild creatures rather than allow controled hunting to keep populations down to where they dont cause a health risk to themselves nor do they pose a significant risk to humans (be that over agressive behavor due to lack of natural food or be that from getting hit by cars, etc).
Its important to know what can be successfuly kept alive and at what skill level one should attempt something and to know if the end result is failure when to just conceed and move on.
Ill give you an example from my own tank. I purchase my wife a flame angel back in Nov of last year. It did ok but never was very active and never ate well. In a few weeks time the fish turned up missing totally. I told her it was likly cyiniade posioned. For christmas I purchased 1 more flame angel and when I showed it to her I told her that if this one does not make it then we will never purchase another flame. Im happy to report that the second flame is living happly in our 75 now for whats going on 8 months.
I know Eric Bornman is developing a 'black list' of corals that he will be publishing soon. These are corals that historicly have proven themselves to have a very poor survivability rate in the aquarium. Education is the key. Seeing an idol in a ank at a LFS
is a horrible site because we all know its never going to get back to its natural habitat. Whats even worse it to know that for that one idol thats in the store tank probably 9 have died along the way. What we can do is try to inform the shop keepers and even those patrions that are looking at such fish of their dismal surviability rate. The best that can come out of it is the shop keeper no longer orders them and the worse is that you no longer be welcome in the store. If the later happens then well im sure there are many other stores that would welcome your business.