You may be right Rasta(you are in Alberta and I'm in BC), and the movie comment I made as a general statement.
Generally, I agree that Moorish Idols should be left were they are. Ideally only advanced and expert aquarists with the abilities to provide for a given species, would be allowed to purchase them.
There are many species that fare poorly with beginner to intermediate aquarists that are often kept successfully by more experienced aquarists(re:Moorish Idols, some even on this BB). A perfect example are Seahorses.
Sometimes our hobby does work. Longnose Filefish
Oxymonacanthus longirostris used to be common to see. It had a very poor survival rate. Now, I don't think I've seen one in a few years(yes I'm sure there have been a few just to prove me wrong!
).