I think detailed ecolabels are a good idea. I believe that "the more you know" the better your experience will be. I would buy products with ecolabels as long as I felt it was detailed enough to truly show that the organism (or rock) was sustainably caught from a legal location.
So many eco friendly labels out there are quite misleading. In terms of the aquatics industry, how would I know if the fish was caught in location X or location A off of the same island, where location X was deemed an illegal capture zone? Once again I have to trust that the companies endorsing the label are legitimate.
I've seen more of this type of thing around the agriculture industry. Everyone has 'certified organic' in some variation on their fruit and veggie stand (and products on shelves) and I'm sure many of them are not actually organic. I actually know many that are not worthy of the label yet still get the extra $$ because of the higher costs of growing and maintaining organic and environmentally friendly produce.
Without research and education, the consumer will be duped time and time again.
That unfortunately is the most difficult part, as Randy has already mentioned- figuring out how to educate the folks that have never considered how the fish/invert arrived in their LFS or buddies tank, what it means to collect sustainably also requires one to know the 'inhumane' practices. It always comes down to money and education.
I mean...as it is many people I know in the hobby, are in it because "the fish are pretty" or they
saw Finding Nemo and their 5 year old wants Nemo. They will go to Petco, overlook potential ich and signs of body deterioration in addition to the care requirements (if provided) and buy a trigger, a tang, 2 clowns, a lionfish, shrimp and an anemone for a 30 gallon tank (the prices for these organisms at Petco are considerably lower than any brick and mortar LFS I've seen in NYC, NJ, or ME).
Petco actually provides caresheets, and has a website that gives similar details to Liveaquaria on care. However, the family/person that puts all of those fish into that 30g tank...chooses not to know.
Now, when it comes to pricing (which leads us into socio-economic inequality issues)...I think that the people that can afford the price increases in general, will buy for a few reasons (also similar to the increase in sustainability/eco labels on food)
1) because they can afford it and do not mind buying the eco brand as opposed to...the unmarked fish
2) they KNOW and care about marine sustainability issues and can afford the increase in price when they know the lower price of the unmarked fish
3) it is the 'new thing to do' (regardless of whether you have a history of caring about the world, it's posh to buy eco friendly products and it becomes a status symbo).
4) they do not know that there is a difference, the are first timers and the first livestock they became aware of are fish with eco labels. They do not know of an alternative and can pay the ecofriendly asking price.
As an aside, I wonder how the trend towards ecolabels for the hobby will impact for sale threads on forums!