I am sorry to hear your experience. I worked in many a couple of pet stores, but I have a couple of tips for you. We often want to make aquarium indiustry self regulate, but that is not likely to happen. The market forces are simply not there. Bringing in morish idols, which live in large schools is almost rediculously cheap. That is why we should involve authorities. I say this with a heavy heart, because I fear that the change of laws is very slow and that is bad should the husbandry capabilities change. With that siad, it is very unlikely that legislation will change about us, but, you can call your local authorities, and have them come over for inspection. In most states (definatly Illinois), the state is obligated to investigate if anybody complains about animals mistreatment (I store that I was in got in trouble because some people that were buying beta's were using them for fighting, without our knowledge). That way, they will get a little scared about bringing in fish that cannot be kept. You might be able to do something about your aquatic friends that way.
However, as an aside, it is possible to keep Morish Idols. They require a sponge heavy diet and several other accomidations, but I have kept one successfully for 5 years, until I gave it to a friend for her tank. That was 2 years ago, and he is still doing well, because she is following my precise instructions. They are still very delicate, and out of the realm of posibility for all but the most experienced hobbyists, and I agree that they should not be imported, except for special orders.