No, haven't heard it, links? As much as I like the idea, I doubt aquarium collectors would have any power against mining companies. As far as food fisheries go, a healthy reef is also beneficial for that, but we all know that everyone wants to make as much profit as possible in the short term...
I do think that the aquarium trade is much better at self-regulating than the food fisheries. For a fisherman, it doesn't matter how much grouper he fishes, he will sell every pound for a good price. But for aquarium fish, if the supply becomes too high, prices drop, and that hurts collectors.