Not being a troll, but I'm not sure that using artificial rock and artificial sand is any eco-friendlier than rock and sand out of the ocean, as long as it is harvested in a responsible and sustainable fashion. (Similar to tridacnid farms, or wild frag farms). Creating sustainable aquaculture on islands throughout the world, is, in my opinion, a better solution. I know of people right now working to create "designer" live rock in the South Pacific where they grow several types of polyps, attach them to rock, and allow the rock to mature in the ocean so that they can deliver premium rock to hobbyists that was never originally from any reef.
I just want to make sure that people have the right knowledge about reefing and it makes me nervous when even our own hobbyists start to feel that reefing is damaging reefs. In some parts of the world this is probably the case - but there are solutions that are being implemented and I expect it will not be the case for very much longer.
Do not forget that the commercial nature of reefing can be a powerful force for conservation and preservation. Ruined reefs do not generate money for anyone. I don't know if any of you remember the years when there was a 100% import ban on tridacnids. Then people realized that clam farming was a relatively eco-friendly business with low start-up costs. Now there are plenty of tridacnids available, at a lower cost than when they were wild caught, and they are even being reintroduced to many areas where they had been overfished (since the primary population pressure on clams was due to fishing for food - not the ornamental marine trade).
Personal opinion.